EP1436438A1 - Aluminium alloy for making fin stock material - Google Patents

Aluminium alloy for making fin stock material

Info

Publication number
EP1436438A1
EP1436438A1 EP02782840A EP02782840A EP1436438A1 EP 1436438 A1 EP1436438 A1 EP 1436438A1 EP 02782840 A EP02782840 A EP 02782840A EP 02782840 A EP02782840 A EP 02782840A EP 1436438 A1 EP1436438 A1 EP 1436438A1
Authority
EP
European Patent Office
Prior art keywords
aluminium alloy
stock material
fin stock
range
alloy according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02782840A
Other languages
German (de)
French (fr)
Inventor
Scott W. Haller
Job Anthonius Van Der Hoeven
Adrianus Jacobus Wittebrood
Achim BÜRGER
Klaus Vieregge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aleris Aluminum Canada LP
Novelis Koblenz GmbH
Original Assignee
Corus LP
Corus Aluminium Walzprodukte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Corus LP, Corus Aluminium Walzprodukte GmbH filed Critical Corus LP
Priority to EP02782840A priority Critical patent/EP1436438A1/en
Publication of EP1436438A1 publication Critical patent/EP1436438A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent

Definitions

  • the invention relates to an aluminium alloy for making fin stock material. Fin stock material is used in heat exchanger devices. The fin stock material is used for making for instance corrugated fins, by which the heat from the heat exchanger must be removed. Furthermore, the invention relates to fin stock material made from the aluminium alloy according to the invention, and to a brazed heat exchanger having fins made of this alloy. Moreover, the invention relates to a method of producing the fin stock alloy and the brazed heat exchanger.
  • aluminium alloys are used for fins in heat exchanger applications because of their desirable combination of strength, weight, thermal conductivity, brazeability, corrosion resistance and formability.
  • Heat exchangers from aluminium can be fabricated by stacking aluminium alloy sheets, which have been formed to a desired configuration, to form fluid passageways or tubes, and by securing aluminium alloy fins between the fluid passageways by brazing.
  • the aluminium alloy sheets used to make the fluid passageways and/or the aluminium alloy used for the fins are provided with a low melting clad layer.
  • the bonding between the alloy clad sheets and the fins is achieved by melting the cladding or filler material of the sheets and/or fin material.
  • As a brazing method typically vacuum brazing or controlled atmosphere brazing is used.
  • fin materials are used which are electrochemically anodic (less noble) relative to the fluid passageways material, so that this fin material has a sacrificial anode effect.
  • This disclosed alloy is said to have an improved post-braze 0.2%-yield strength (also referred to as 0.2%-offset proof stress or 0.2% PS) over conventional alloys for the same application.
  • an aluminium alloy for making fin stock material having the composition in weight percent:
  • V ⁇ 0.40 and or Ti ⁇ 0.01 and or Cr ⁇ 0.01 and or Zr ⁇ 0.01 other elements up to 0.05 each, up to 0.15 in total
  • This aluminium alloy has a very good thermal conductivity, thereby improving the heat exchange properties of the fins made from this aluminium alloy . Moreover, this aluminium alloy has satisfactory mechanical properties in the post-brazed condition, such as tensile strength and corrosion potential.
  • this aluminium alloy is primarily intended as fin stock material for heat exchangers, it may be used for other parts of heat exchange units, such as tube plate, or other uses.
  • the heat exchanger market requires a balance of properties for fin stock alloys, which includes strength, conductivity, formability, brazeability and corrosion potential. If one of these properties should be improved where the other properties must remain as good as they are, often many of the alloying elements in the composition must be changed in relation to each other.
  • Si is an important alloying element in the alloy according to the invention; it is expected that Si improves the strength of the alloy by solid solution hardening and precipitation hardening. Because the solid solution in the alloy should be as low as possible for the required conductivity, the amount of Si should not be higher than 1.2 %. When the amount of Si is higher, too much Si will remain in solid solution, resulting in a lower conductivity. A more preferred range for Si is 0.4 to 0.8 %. Within this range the required combination of strength and conductivity is reached best.
  • Mn is an important alloying element in conventional alloys for making fin stock material. Mn is normally added for strength. In the alloy according to this invention, the Mn content is kept very low so as to reduce the amount of solid solution in the alloy. Preferably Mn ⁇ 0.03 %, and more preferably Mn ⁇ 0.01 %, thereby improving the conductivity as much as possible. Mn may also be absent.
  • Mg increases the strength of the alloy significantly, but has a detrimental effect on controlled atmosphere brazeability because it tends to interact with the flux material. For this reason the Mg content has a maximum of 0.05 %, and preferably Mg ⁇ 0.03 %, and more preferably Mg ⁇ 0.01%, to keep the Mg content as low as possible. Mg may also be absent.
  • Fe is an alloying element that is present in all known aluminium alloys. Fe is added for post-braze strength. It is supposed to form precipitates with Al, Ni and Si. The solid solubility of Fe in Al is extremely low; therefore, Fe can be used to improve the strength without compromising the conductivity.
  • Fe is in the range of 0.3 % to 1.6 %, and more preferably in the range of 0.7 % to 1.3 %, so as to reach a preferred strength without compromising the formability.
  • Ni is also present to improve the post-braze strength of the alloy. Like Fe, the solid solubility of Ni in Al is extremely low; therefore, Ni can be used to improve the strength without compromising the conductivity. However, when the Ni content is > 2 %, the formability becomes too low. Ni is preferably present in the range of of 0.8 to 1.2 % because in this range the best combination of strength and formability is found.
  • Cu is present in the alloy according to the invention to improve the post-braze strength of the alloy.
  • the amount of Cu is preferably restricted to the range of 0.1 % to 0.8 %, and more preferably to the range of 0.1 % to 0.6 %, so as to reach the required strength.
  • Cu is believed to increase the corrosion potential of the alloy, whereas the corrosion potential should be low to allow the fin material to act as a sacrificial anode.
  • at least one of the elements Zn, Sn or In should be present. Zn, Sn or In, or a combination of these three elements, are present to counteract the effect of Cu on the corrosion potential of the alloy.
  • the amount of these elements must therefore be higher than zero, taking into account the stronger effect of Sn and especially In as compared to Zn.
  • the amounts of Zn, Sn and In should not be higher than necessary and therefore preferably Zn is in the range of 1.0 % to 3.0 % and/or
  • Sn is in the range of 0.1 % to 1.0 % and/or In is in the range of 0.01 % to 0.05 %.
  • Zn can be (partly) replaced by Sn and or In.
  • Ti, N, Cr and Zr are to be avoided as much as possible, because they have a negative effect on the conductivity of the alloy.
  • these elements are below
  • fin stock material made from the aluminium alloy as specified above, wherein the fin stock material has a post-braze conductivity of at least 26 MS/m (45 % IACS), and preferably at least 29 MS/m (50 % IACS). A conductivity of more than 45 % IACS is good and a conductivity of more than 50 % IACS is very good in comparison to conventional fin stock material for heat exchangers.
  • the fin stock material has a corrosion potential between -750 mV and
  • the fin stock material has a post braze UTS (Ultimate Tensile Strength) between 135 and 155 MPa, and/or a 0.2% PS > 50
  • a brazed heat exchanger having fins made of an aluminium alloy according the first aspect of the invention, or having fins made of fin stock material according to the second aspect of the invention.
  • the nine different chemistries as specified in table 1 were cast and sawn to pieces with a thickness of 80 mm, and thereafter preheated to a temperature below 540°C, the alloys were not homogenised. Subsequently hot rolled at a temperature below 540°C and cold rolled to a thickness of 0.15 mm. After inter annealing, the pieces were cold rolled to a thickness of 0.1 mm.
  • alloys 1 to 4 of table 1 no Ti, N, Cr or Zr is present.
  • the Zn present in the alloys can be (partly) replaced by Sn and or In, as is known in the art.
  • the alloys 4 to 9 are comparative examples that do not fit in the alloy ranges according to the invention.
  • the amount of Mn is too high.
  • alloys 6.7 and 8 additions of Zr, Ti and N, respectively, are also present.
  • the Mn level of alloys 4 and 5 is increased as compared to alloys 1, 2 and 3, the strength is not significantly increased. This is attributed to the decrease in ⁇ i.
  • Alloys 6, 7 and 8 show that with the ⁇ i level of alloys 4 and 5 high strength can be reached when Zr, Ti or N additions are present. However, due to the additions of Mn, Zr, Ti or N in the alloys 4 to 9, the conductivity of these alloys is comparatively low.
  • the three alloys 1, 2 and 3 having a composition according to the invention clearly have a high conductivity, a sufficiently high strength and a corrosion potential within the required range to get the sacrificial anode effect.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Conductive Materials (AREA)
  • Laminated Bodies (AREA)

Abstract

An aluminium alloy for making fin stock material, having the composition in weight percent: Si ≤ 1.2 Mn ≤ 0.05 Mg ≤ 0.05 Fe ≤ 2.0 0.5 ≤ Ni ≤ 1.5 0.05 ≤: Cu ≤: 1.0 0.5 ≤ Zn ≤ 4.0 and/or 0.1 ≤ Sn ≤ 2.0 and/or 0.01 ≤: In ≤ 0.5 V ≤ 0.40 and/or Ti <0.01 and/or Cr <0.01 and/or Zr <0.01 other elements up to 0.05 each, up to 0.15 in total Al balance.

Description

ALUMINIUM ALLOY FOR MAKING FIN STOCK MATERIAL
FIELD OF THE INVENTION The invention relates to an aluminium alloy for making fin stock material. Fin stock material is used in heat exchanger devices. The fin stock material is used for making for instance corrugated fins, by which the heat from the heat exchanger must be removed. Furthermore, the invention relates to fin stock material made from the aluminium alloy according to the invention, and to a brazed heat exchanger having fins made of this alloy. Moreover, the invention relates to a method of producing the fin stock alloy and the brazed heat exchanger.
DESCRIPTION OF THE RELATED ART
In the prior art, aluminium alloys are used for fins in heat exchanger applications because of their desirable combination of strength, weight, thermal conductivity, brazeability, corrosion resistance and formability.
Heat exchangers from aluminium can be fabricated by stacking aluminium alloy sheets, which have been formed to a desired configuration, to form fluid passageways or tubes, and by securing aluminium alloy fins between the fluid passageways by brazing. The aluminium alloy sheets used to make the fluid passageways and/or the aluminium alloy used for the fins are provided with a low melting clad layer. The bonding between the alloy clad sheets and the fins is achieved by melting the cladding or filler material of the sheets and/or fin material. As a brazing method, typically vacuum brazing or controlled atmosphere brazing is used. To improve the corrosion resistance of the fluid passageways, fin materials are used which are electrochemically anodic (less noble) relative to the fluid passageways material, so that this fin material has a sacrificial anode effect.
An example of an aluminium alloy for making fin material is given in International patent application no. WO 01/36697. This alloy has the following composition, in weight percent:
Si 0.7 - 1.2
Mn 0.7 - 1.2
Mg up to 0.35 Fe up to 0.8 Zn up to 3.0 Ni up to 1.5 Cu up to 0.5 Ti up to 0.20
In up to 0.20 Zr up to 0.25 V up to 0.25 Cr up to 0.25 others up to 0.05 each, and up to 0.15 in total.
Al balance. This disclosed alloy is said to have an improved post-braze 0.2%-yield strength (also referred to as 0.2%-offset proof stress or 0.2% PS) over conventional alloys for the same application.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an aluminium alloy for making fin stock material which can be used for heat exchangers, and which has an improved thermal conductivity. It is another object of the invention to provide such an aluminium alloy, which has a strength which is at least as good as the strength of conventional aluminium alloys for making fin stock material.
It is still another object of the invention to provide such an aluminium alloy, which has a corrosion potential which is at least as negative as the corrosion potential of conventional aluminium alloys for making fin stock material.
In one aspect of the invention one or more of these objects are reached with an aluminium alloy for making fin stock material, having the composition in weight percent:
' Si ≤ 1.2 Mn < 0.05
Mg ≤ 0.05 Fe < 2.0 0.5 < Ni < 1.5
0.05 ≤ Cu ≤ 1.0
0.5 < Zn < 4.0 and or 0.1 < Sn < 2.0 and or 0.01 < In < 0.5
V < 0.40 and or Ti <0.01 and or Cr <0.01 and or Zr <0.01 other elements up to 0.05 each, up to 0.15 in total
Al balance.
This aluminium alloy has a very good thermal conductivity, thereby improving the heat exchange properties of the fins made from this aluminium alloy . Moreover, this aluminium alloy has satisfactory mechanical properties in the post-brazed condition, such as tensile strength and corrosion potential.
Although this aluminium alloy is primarily intended as fin stock material for heat exchangers, it may be used for other parts of heat exchange units, such as tube plate, or other uses.
The heat exchanger market, particularly in the automotive industry, requires a balance of properties for fin stock alloys, which includes strength, conductivity, formability, brazeability and corrosion potential. If one of these properties should be improved where the other properties must remain as good as they are, often many of the alloying elements in the composition must be changed in relation to each other.
In the present case, it is the merit of the invention that has been seen that the conductivity of the alloy could be improved by decreasing the solid solution in the alloy through carefully selecting the content of certain alloying elements. This has resulted in the following limitations of the alloying elements in the aluminium alloy according to the present invention. All percentages are by weight.
Si is an important alloying element in the alloy according to the invention; it is expected that Si improves the strength of the alloy by solid solution hardening and precipitation hardening. Because the solid solution in the alloy should be as low as possible for the required conductivity, the amount of Si should not be higher than 1.2 %. When the amount of Si is higher, too much Si will remain in solid solution, resulting in a lower conductivity. A more preferred range for Si is 0.4 to 0.8 %. Within this range the required combination of strength and conductivity is reached best. Mn is an important alloying element in conventional alloys for making fin stock material. Mn is normally added for strength. In the alloy according to this invention, the Mn content is kept very low so as to reduce the amount of solid solution in the alloy. Preferably Mn < 0.03 %, and more preferably Mn < 0.01 %, thereby improving the conductivity as much as possible. Mn may also be absent.
Mg increases the strength of the alloy significantly, but has a detrimental effect on controlled atmosphere brazeability because it tends to interact with the flux material. For this reason the Mg content has a maximum of 0.05 %, and preferably Mg < 0.03 %, and more preferably Mg < 0.01%, to keep the Mg content as low as possible. Mg may also be absent.
Fe is an alloying element that is present in all known aluminium alloys. Fe is added for post-braze strength. It is supposed to form precipitates with Al, Ni and Si. The solid solubility of Fe in Al is extremely low; therefore, Fe can be used to improve the strength without compromising the conductivity. Preferably Fe is in the range of 0.3 % to 1.6 %, and more preferably in the range of 0.7 % to 1.3 %, so as to reach a preferred strength without compromising the formability.
Ni is also present to improve the post-braze strength of the alloy. Like Fe, the solid solubility of Ni in Al is extremely low; therefore, Ni can be used to improve the strength without compromising the conductivity. However, when the Ni content is > 2 %, the formability becomes too low. Ni is preferably present in the range of of 0.8 to 1.2 % because in this range the best combination of strength and formability is found.
Cu is present in the alloy according to the invention to improve the post-braze strength of the alloy. The amount of Cu is preferably restricted to the range of 0.1 % to 0.8 %, and more preferably to the range of 0.1 % to 0.6 %, so as to reach the required strength. However, Cu is believed to increase the corrosion potential of the alloy, whereas the corrosion potential should be low to allow the fin material to act as a sacrificial anode. For this reason, at least one of the elements Zn, Sn or In should be present. Zn, Sn or In, or a combination of these three elements, are present to counteract the effect of Cu on the corrosion potential of the alloy. The amount of these elements must therefore be higher than zero, taking into account the stronger effect of Sn and especially In as compared to Zn. The amounts of Zn, Sn and In should not be higher than necessary and therefore preferably Zn is in the range of 1.0 % to 3.0 % and/or
Sn is in the range of 0.1 % to 1.0 % and/or In is in the range of 0.01 % to 0.05 %.
Preferably, only Zn is present, but Zn can be (partly) replaced by Sn and or In. Ti, N, Cr and Zr are to be avoided as much as possible, because they have a negative effect on the conductivity of the alloy. Preferably, these elements are below
0.01 % each.
It is expected that all elements present in the aluminium are detrimental to the conductivity of the alloy. Both impurities and intentionally added elements should therefore be as low as possible, the intentionally added elements being added in so far as they are needed to reach the desired properties.
In a second aspect of the invention there is provided fin stock material made from the aluminium alloy as specified above, wherein the fin stock material has a post-braze conductivity of at least 26 MS/m (45 % IACS), and preferably at least 29 MS/m (50 % IACS). A conductivity of more than 45 % IACS is good and a conductivity of more than 50 % IACS is very good in comparison to conventional fin stock material for heat exchangers.
Preferably, the fin stock material has a corrosion potential between -750 mV and
-950 mV versus SCE (ASTM G69), more preferably between -750 mN and -850 mN according to SCE (ASTM G69). The indication SCE means that the voltage in mN has been measured in relation to a saturated calomel electrode. These values for the corrosion potential give a good sacrificial anode effect when this fin stock material is used in heat exchangers.
According to a preferred embodiment the fin stock material has a post braze UTS (Ultimate Tensile Strength) between 135 and 155 MPa, and/or a 0.2% PS > 50
MPa. This strength is sufficiently high for normal use of fin stock material.
According to a third aspect of the invention, there is provided a brazed heat exchanger having fins made of an aluminium alloy according the first aspect of the invention, or having fins made of fin stock material according to the second aspect of the invention. EXAMPLES
The aluminium alloy and fin stock material in accordance with the invention will now be illustrated by non-limitative and comparative examples.
On a laboratory scale nine alloys have been cast with solidification rates in a range comparable to solidification rates in industrial scale DC-casting. These alloys are manufactured on a laboratory scale, but the aluminium alloy in accordance with this invention can be manufactured on an industrial scale using various standard industrial scale DC-casting and continuous aluminium casting methods, followed by hot and/or cold rolling.
The chemical compositions of the nine alloy examples are given in table 1, some relevant properties after brazing simulation are given in table 2.
Table 1. Chemical composition, in wt%, of the aluminium alloys tested, the balance is aluminium and impurities.
Table2. Properties after simulated brazing cycle.
The nine different chemistries as specified in table 1 were cast and sawn to pieces with a thickness of 80 mm, and thereafter preheated to a temperature below 540°C, the alloys were not homogenised. Subsequently hot rolled at a temperature below 540°C and cold rolled to a thickness of 0.15 mm. After inter annealing, the pieces were cold rolled to a thickness of 0.1 mm.
In the alloys 1 to 4 of table 1, no Ti, N, Cr or Zr is present. The Zn present in the alloys can be (partly) replaced by Sn and or In, as is known in the art. As can be seen, the alloys 4 to 9 are comparative examples that do not fit in the alloy ranges according to the invention. The amount of Mn is too high. In alloys 6.7 and 8 additions of Zr, Ti and N, respectively, are also present. Despite the fact that the Mn level of alloys 4 and 5 is increased as compared to alloys 1, 2 and 3, the strength is not significantly increased. This is attributed to the decrease in Νi. Alloys 6, 7 and 8 show that with the Νi level of alloys 4 and 5 high strength can be reached when Zr, Ti or N additions are present. However, due to the additions of Mn, Zr, Ti or N in the alloys 4 to 9, the conductivity of these alloys is comparatively low.
The three alloys 1, 2 and 3 having a composition according to the invention clearly have a high conductivity, a sufficiently high strength and a corrosion potential within the required range to get the sacrificial anode effect.

Claims

1. An aluminium alloy for making fin stock material, having the composition in weight percent: Si < 1.2
Mn ≤ 0.05
Mg ≤ 0.05
Fe < 2.0
0.5 < Ni < 1.5 0.05 ≤ Cu ≤ 1.0
0.5 < Zn ≤ 4.0 and or 0.1 < Sn < 2.0 and/or 0.01 < In < 0.5
V < 0.40 and/or Ti <0.01 and or Cr <0.01 and/or Zr <0.01 other elements up to 0.05 each, up to 0.15 in total
Al balance.
2. An aluminium alloy according to claim 1, wherein Si is in the range of 0.4 % to 0.8 %.
3. An aluminium alloy according to claim 1 or 2, wherein Mn ≤ 0.03 %.
4. An aluminium alloy according to claim 3, wherein Mn < 0.01 %.
5. An aluminium alloy according to any of the claims 1 to 4, wherein Mg < 0.03 %.
6. An aluminium alloy according to claim 5, wherein Mg < 0.01 %.
7. An aluminium alloy according to any of the preceding claims, wherein Fe is in the range of 0.3 % to 1.6 %, and preferably in the range of 0.7 % to 1.3 %.
8. An aluminium alloy according to any of the preceding claims, wherein Ni is in the range of 0.8 % to 1.2 %.
9. An aluminium alloy according to any of the preceding claims, wherein Cu is in the range of 0.1 % to 0.8 %, and preferably in the range of 0.1 % to 0.6 %.
10. An aluminium alloy according to any of the preceding claims, wherein Zn is in the range of 1.0 % to 3.0 % and/or Sn is in the range of 0.1 % to 1.0 % and/or In is in the range of 0.01 % to 0.05 %.
11. An aluminium alloy according to any of the preceding claims, wherein no In and no Sn is present.
12. An aluminium alloy according to any of the preceding claims, wherein N <0.01
%.
13. Fin stock material made from the aluminium alloy according to any of the preceding claims, wherein the fin stock material has a post-braze conductivity of at least 26 MS/m (45 % IACS), and preferably at least 29 MS/m (50 % IACS).
14. Fin stock material according to claim 13, wherein the fin stock material has a corrosion potential between -750 mN and -950 mN versus SCE (ASTM G69), preferably between -750 mN and -850 mN versus SCE (ASTM G69).
15. Fin stock material according to claim 13 or 14, wherein the fin stock material has a post braze Ultimate Tensile Strength between 135 and 155 MPa.
16. Fin stock material according to claim 13, 14 or 15, wherein the fin stock material has a 0.2%-offset proof stress > 50 MPa.
17. Fin stock material according to one of claims 13 - 16, wherein the fin stock material has been clad on at least one side with a clad layer having a lower melting point than the fin stock material.
18. A brazed heat exchanger having fins made of an aluminium alloy according to any one of claims 1 - 12.
19. A brazed heat exchanger having fins made of fin stock material according to any one of claims 13 - 17.
EP02782840A 2001-10-05 2002-10-02 Aluminium alloy for making fin stock material Withdrawn EP1436438A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02782840A EP1436438A1 (en) 2001-10-05 2002-10-02 Aluminium alloy for making fin stock material

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01203759 2001-10-05
EP01203759A EP1300480A1 (en) 2001-10-05 2001-10-05 Aluminium alloy for making fin stock material
PCT/EP2002/011191 WO2003031667A1 (en) 2001-10-05 2002-10-02 Aluminium alloy for making fin stock material
EP02782840A EP1436438A1 (en) 2001-10-05 2002-10-02 Aluminium alloy for making fin stock material

Publications (1)

Publication Number Publication Date
EP1436438A1 true EP1436438A1 (en) 2004-07-14

Family

ID=8181014

Family Applications (2)

Application Number Title Priority Date Filing Date
EP01203759A Withdrawn EP1300480A1 (en) 2001-10-05 2001-10-05 Aluminium alloy for making fin stock material
EP02782840A Withdrawn EP1436438A1 (en) 2001-10-05 2002-10-02 Aluminium alloy for making fin stock material

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01203759A Withdrawn EP1300480A1 (en) 2001-10-05 2001-10-05 Aluminium alloy for making fin stock material

Country Status (8)

Country Link
US (1) US20050019204A1 (en)
EP (2) EP1300480A1 (en)
JP (1) JP2005504890A (en)
KR (1) KR20040045477A (en)
CN (1) CN1578844A (en)
CA (1) CA2462074A1 (en)
MX (1) MXPA04003133A (en)
WO (1) WO2003031667A1 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060135783A (en) 2004-02-25 2006-12-29 메르크 파텐트 게엠베하 Reactive mesogenic charge transport compounds
CN100402686C (en) * 2005-03-07 2008-07-16 东北轻合金有限责任公司 Aluminium alloy foil used for automobile radiator and its making method
JP2008006480A (en) * 2006-06-30 2008-01-17 Sumitomo Light Metal Ind Ltd Brazing fin material for heat exchanger, heat exchanger, and method for manufacturing the same
KR100840385B1 (en) * 2006-07-20 2008-06-23 성훈엔지니어링(주) Heat resisting aluminum alloy
US20090279566A1 (en) * 2008-05-12 2009-11-12 Motorola, Inc. Method and system for reducing call set up time in a group call
CN101660883B (en) * 2009-09-04 2011-10-26 东莞市奥达铝业有限公司 Manufacturing method of vehicle aluminum alloy radiating fin
CN102011036A (en) * 2010-11-24 2011-04-13 肇庆莱尔达光电科技有限公司 Die casting aluminum alloy
JP5789401B2 (en) * 2011-04-15 2015-10-07 株式会社神戸製鋼所 Aluminum fin material for heat exchanger
CN102296217A (en) * 2011-08-24 2011-12-28 吴江市精工铝字制造厂 High-strength heat-resistant aluminum alloy
ES2646767T3 (en) 2011-12-16 2017-12-15 Novelis, Inc. Aluminum alloy for fins and method of producing it
CN102534325B (en) * 2011-12-31 2013-10-16 江苏常铝铝业股份有限公司 Horizontal-flow porous pipe for heat exchanger and manufacturing method of the horizontal-flow porous pipe
PL2852494T3 (en) * 2012-05-23 2022-10-17 Gränges Finspång AB Ultra sagging and melting resistant fin material with very high strength
KR101468957B1 (en) * 2012-05-30 2014-12-05 한국기계연구원 Aluminum alloy for casting
CN102703783A (en) * 2012-05-30 2012-10-03 江门市长利光电科技有限公司 High-heat conduction aluminum alloy for casting
JP5954099B2 (en) 2012-10-12 2016-07-20 日本軽金属株式会社 Aluminum alloy sheet for battery cases with excellent formability, heat dissipation and weldability
CN102994813A (en) * 2012-11-19 2013-03-27 宁波福士汽车部件有限公司 Aluminum alloy material for air conditioner pipe
CN103572078A (en) * 2013-10-21 2014-02-12 姚富云 Refining method of aluminum alloy for heat exchangers
CN103572123A (en) * 2013-10-21 2014-02-12 姚富云 Manufacturing method of heat exchanger aluminum alloy radiating fin suitable for hard brazing
CN103572101A (en) * 2013-10-21 2014-02-12 姚富云 Heat exchanger aluminum alloy radiating fin material suitable for hard brazing
JP6206322B2 (en) * 2014-05-14 2017-10-04 日本軽金属株式会社 Aluminum alloy fin material for heat exchanger excellent in brazing and sag resistance and method for producing the same
EP3177748B1 (en) * 2014-08-06 2020-09-30 Novelis, Inc. Aluminum alloy for heat exchanger fins
CN104233007A (en) * 2014-08-27 2014-12-24 邹平齐星工业铝材有限公司 High-thermal-conductivity heat transfer fin and manufacturing method thereof
CN104532084A (en) * 2014-11-25 2015-04-22 安徽天祥空调科技有限公司 High strength anti-cracking air conditioning radiator aluminum alloy sheet and preparation method thereof
CN105296814A (en) * 2015-11-03 2016-02-03 任静儿 Aluminum alloy for battery wiring terminal
CN105441758A (en) * 2015-11-03 2016-03-30 任静儿 Aluminum alloy for battery connecting terminal
CN105296813A (en) * 2015-11-03 2016-02-03 任静儿 Aluminum alloy for liquid crystal display device wire harness
CN107742614A (en) * 2017-10-30 2018-02-27 镇江佳鑫精工设备有限公司 A kind of semiconductor equipment circuit board

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1524355A (en) * 1975-10-31 1978-09-13 Alcan Res & Dev Aluminium alloy sheet products
JPS57163725A (en) * 1979-09-28 1982-10-08 Taiho Kogyo Co Ltd Sliding bearing
JPH0525572A (en) * 1991-07-19 1993-02-02 Furukawa Alum Co Ltd Corrosion resisting aluminum alloy clad material for high temperature forming
KR0184019B1 (en) * 1993-08-03 1999-05-01 도모마쯔 겐고 Aluminum alloy brazing material and brazing sheet for heat-exchanges
JP3981495B2 (en) * 1999-04-16 2007-09-26 古河スカイ株式会社 Hypereutectic Al-Ni-Fe alloy continuous casting rolled coil manufacturing method
CN1177070C (en) * 1999-11-17 2004-11-24 克里斯铝轧制品有限公司 Aluminium brazing alloy
US6329075B1 (en) * 2000-02-03 2001-12-11 Reycan, L.P. Electrical conductivity and high strength aluminum alloy composite material and methods of manufacturing and use
US7407714B2 (en) * 2004-05-26 2008-08-05 Aleris Aluminum Koblenz Gmbh Process by producing an aluminium alloy brazing sheet, aluminium alloy brazing sheet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03031667A1 *

Also Published As

Publication number Publication date
JP2005504890A (en) 2005-02-17
KR20040045477A (en) 2004-06-01
MXPA04003133A (en) 2004-07-08
CN1578844A (en) 2005-02-09
WO2003031667A1 (en) 2003-04-17
CA2462074A1 (en) 2003-04-17
EP1300480A1 (en) 2003-04-09
US20050019204A1 (en) 2005-01-27

Similar Documents

Publication Publication Date Title
WO2003031667A1 (en) Aluminium alloy for making fin stock material
JP2002161323A (en) Aluminum alloy fin-material for heat exchanger superior in formability and brazability
WO2001036697A2 (en) Aluminium brazing alloy
EP1576332A1 (en) Aluminum alloy tube and fin assembly for heat exchangers having improved corrosion resistance after brazing
WO2013024732A1 (en) Aluminum alloy fin material for heat exchanger offering excellent post-brazing strength and corrosion resistance
JP5578702B2 (en) Aluminum alloy fin material for heat exchanger and heat exchanger
JP5743642B2 (en) Aluminum alloy brazing sheet
JP2000144290A (en) Aluminum alloy sacrificial anode material for heat exchanger and high corrosion resistant aluminum alloy composite material using the same
JPH1088265A (en) Aluminum alloy fin material for heat exchanger, excellent in sacrificial anode effect as well as in strength after brazing
EP0582235B1 (en) Aluminum alloy fin material for heat-exchanger
JP2002161324A (en) Aluminum alloy fin-material for heat exchanger superior in formability and brazability
AU2002347061A1 (en) Aluminium alloy for making fin stock material
JPH0250934A (en) Brazing sheet made of aluminum for heat exchanger member
JP4906162B2 (en) Aluminum alloy brazing sheet
JPH0210212B2 (en)
JP3743709B2 (en) Aluminum alloy fin material for heat exchangers with excellent formability and brazing
JP3337771B2 (en) Aluminum alloy composite for heat exchanger
JP2002155332A (en) Aluminum alloy fin material for heat exchanger having excellent formability and brazability
KR20230124698A (en) High-strength, sag-resistant aluminum alloy for use as fin stock, and method of making the same
JP3763522B2 (en) Aluminum alloy fin material for heat exchangers with excellent formability and brazing
JPH0256413B2 (en)
JPH06145859A (en) High strength al alloy clad material for heat exchanger excellent in pitting corrosion resistance
JP2801192B2 (en) Aluminum alloy and aluminum alloy composite for heat exchanger members
JP2001226730A (en) Aluminum alloy fin material
JPH11302761A (en) Aluminum alloy sacrificial anode material for heat exchanger and high corrosion-resistant aluminum alloy composite material for heat exchanger

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040506

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20080514