CA2540000A1 - Low carbon alloy steel tube having ultra high strength and excellent toughness at low temperature and method of manufacturing the same - Google Patents

Low carbon alloy steel tube having ultra high strength and excellent toughness at low temperature and method of manufacturing the same Download PDF

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Publication number
CA2540000A1
CA2540000A1 CA002540000A CA2540000A CA2540000A1 CA 2540000 A1 CA2540000 A1 CA 2540000A1 CA 002540000 A CA002540000 A CA 002540000A CA 2540000 A CA2540000 A CA 2540000A CA 2540000 A1 CA2540000 A1 CA 2540000A1
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steel tube
low carbon
tubing
carbon alloy
alloy steel
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CA002540000A
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French (fr)
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CA2540000C (en
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Edgardo Oscar Lopez
Eduardo Altschuler
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Tenaris Connections AG
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/20—Ferrous alloys, e.g. steel alloys containing chromium with copper
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

A low carbon alloy steel tube and a method of manufacturing the same, in which the steel tube consists essentially of, by weight: about 0.06% to about 0.18%
carbon; about 0.5% to about 1.5% manganese; about 0.1% to about 0.5% silicon;
up to about 0.015% sulfur; up to about 0.025% phosphorous; up to about 0.50%
nickel; about 0.1% to about 1.0% chromium; about 0.1% to about 1.0%
molybdenum; about 0.01% to about 0.10% vanadium; about 0.01% to about 0.10%
titanium; about 0.05% to about 0.35% copper; about 0.010% to about 0.050%
aluminum; up to about 0.05% niobium; up to about 0.15% residual elements; and the balance iron and incidental impurities. The steel has a tensile strength of at least about 145 ksi and exhibits ductile behavior at temperatures as low as -60 ~C.

Claims (39)

1. A low carbon alloy steel tube consisting essentially of, by weight: about 0.06% to about 0.18% carbon; about 0.5% to about 1.5% manganese; about 0.1% to about 0.5%
silicon; up to about 0.015% sulfur; up to about 0.025% phosphorous; up to about 0.50%
nickel; about 0.1% to about 1.0% chromium; about 0.1% to about 1.0%
molybdenum; about 0.01% to about 0.10% vanadium; about 0.01% to about 0.10% titanium; about 0.05% to about 0.35% copper; about 0.010% to about 0.050% aluminum; up to about 0.05%
niobium;
up to about 0.15% residual elements; and the balance iron and incidental impurities, wherein the steel tube has a tensile strength of at least about 145 ksi and has a ductile-to-brittle transition temperature below -60 °.
2. The low carbon alloy steel tube of claim 1, wherein the steel tube consists essentially of, by weight: about 0.07% to about 0.12% carbon; about 1.00% to about 1.40%
manganese;
about 0.15% to about 0.35% silicon; up to about 0.010% sulfur; up to about 0.015%
phosphorous; up to about 0.20% nickel; about 0.55% to about 0.80% chromium;
about 0.30% to about 0.50% molybdenum; about 0.01% to about 0.07% vanadium; about 0.01% to about 0.05% titanium; about 0.15% to about 0.30% copper; about 0.010% to about 0.050%
aluminum; up to about 0.05% niobium; up to about 0.15% residual elements; and the balance iron and incidental impurities.
3. The low carbon alloy steel tube of claim 1, wherein the steel tube consists essentially of, by weight: about 0.08% to about 0.11% carbon; about 1.03% to about 1.18%
manganese;
about 0.15% to about 0.35% silicon; up to about 0.003% sulfur; up to about 0.012%
phosphorous; up to about 0.10% nickel; about 0.63% to about 0.73% chromium;
about 0.40% to about 0.45% molybdenum; about 0.03% to about 0.05% vanadium; about 0.025%
to about 0.035% titanium; about 0.15% to about 0.30% copper; about 0.010% to about 0.050% aluminum; up to about 0.05% niobium; up to about 0.15% residual elements; and the balance iron and incidental impurities.
4. The low carbon alloy steel tube of claim 1, wherein the steel tube has a yield strength of at least about 125 ksi.
5. The low carbon alloy steel tube of claim 1, wherein the steel tube has a yield strength of at least about 135 ksi
6. The low carbon alloy steel tube of claim 1, wherein the steel tube has an elongation at break of at least about 9%.
7. The low carbon alloy steel tube of claim 1, wherein the steel tube has a hardness of no more than about 40 HRC.
8. The low carbon alloy steel tube of claim 1, wherein the steel tube has a hardness of no more than about 37 HRC.
9. The low carbon alloy steel tube of claim 1, wherein the steel tube has a carbon equivalent of less than about 0.63%, the carbon equivalent being determined according to the formula:
Ceq = %C + %Mn/6 + (%Cr + %Mo + %V)/5 + (%Ni + %Cu)/15.
10. The low carbon alloy steel tube of claim 9, wherein the steel tube has a carbon equivalent of less than about 0.60%.
11. The low carbon alloy steel tube of claim 9, wherein the steel tube has a carbon equivalent of less than about 0.56%.
12. The low carbon alloy steel tube of claim 1, wherein the steel tube has a maximum microinclusion content of 2 or less --thin series--, and level 1 or less --heavy series--, measured in accordance with ASTM E45 Standard - Worst Field Method (Method A).
13 13. The low carbon alloy steel tube of claim 1, wherein the steel tube has a maximum microinclusion content measured in accordance with ASTM E45 Standard - Worst Field Method (Method A), as follows:
Inclusion Thin Heavy Type A 0.5 0 B 1.5 1.0 D 1.5 0.5
14. The low carbon alloy steel tube of claim 13, wherein oversize inclusion content with 30 µm or less in size is obtained.
15. The low carbon alloy steel tube of claim 14, wherein the total oxygen content is limited to 20 ppm.
16. The low carbon alloy steel tube of claim 1, wherein the tube has a seamless configuration.
17. A stored gas inflator pressure vessel comprising the low carbon alloy steel tube of claim 1.
18. An automotive airbag inflator comprising the low carbon alloy steel tube of claim 1.
19. A low carbon alloy steel tube consisting essentially of, by weight: about 0.08% to about 0.11% carbon; about 1.03% to about 1.18% manganese; about 0.15% to about 0.35%
silicon; up to about 0.003% sulfur; up to about 0.012% phosphorous; up to about 0.10%
nickel; about 0.63% to about 0.73% chromium; about 0.40% to about 0.45%
molybdenum;
about 0.03% to about 0.05% vanadium; about 0.025% to about 0.035% titanium;
about 0.15% to about 0.30% copper; about 0.010% to about 0.050% aluminum; up to about 0.05%
niobium; up to about 0.15% residual elements; and the balance iron and incidental impurities, wherein the steel tube has a yield strength of at least about 135 ksi, a tensile strength of at least about 145 ksi, an elongation at break of of at least about 9%, a hardness of no more than about 37 HRC, and has a ductile-to-brittle transition temperature below -60°C.
20. The low carbon alloy steel tube of claim 19, wherein the tube has a seamless configuration.
21. A stored gas inflator pressure vessel comprising the low carbon alloy steel tube of claim 19.
22. An automotive airbag inflator comprising the low carbon alloy steel tube of claim 19.
23. A method of manufacturing a length of steel tubing for a stored gas inflator pressure vessel, comprising the following steps:
producing a length of tubing from a steel material consisting essentially of, by weight:
about 0.06% to about 0.18% carbon, about 0.5% to about 1.5% manganese, about 0.1% to about 0.5% silicon, up to about 0.015% sulfur, up to about 0.025% phosphorous, up to about 0.50% nickel, about 0.1% to about 1.0% chromium, about 0.1% to about 1.0%
molybdenum, about 0.01% to about 0.10% vanadium, about 0.01% to about 0.10% titanium, about 0.05%
to about 0.35% copper, about 0.010% to about 0.050% aluminum, up to about 0.05%
niobium, up to about 0.15% residual elements, and the balance iron and incidental impurities;
subjecting the steel tubing to a cold-drawing process to obtain desired dimensions;
austenizing by heating the cold-drawn steel tubing in an induction-type austenizing furnace to a temperature of at least Ac3, at a heating rate of at least about 100°C per second;

after the heating step, quenching the steel tubing in a quenching fluid until the tubing reaches approximately ambient temperature, at a cooling rate of at least about 100°C per second; and after the quenching step, tempering the steel tubing for about 2-30 minutes at a temperature below Acl.
24. The method of claim 23, wherein the steel tubing produced consists essentially of, by weight: about 0.07% to about 0.12% carbon, about 1.00% to about 1.40%
manganese, about 0.15% to about 0.35% silicon, up to about 0.010% sulfur, up to about 0.015%
phosphorous, up to about 0.20% nickel, about 0.55% to about 0.80% chromium, about 0.30% to about 0.50% molybdenum, about 0.01% to about 0.07% vanadium, about 0.01% to about 0.05%
titanium, about 0.15% to about 0.30% copper, about 0.010% to about 0.050%
aluminum, up to about 0.05% niobium, up to about 0.15% residual elements, and the balance iron and incidental impurities.
25. The method of claim 23, wherein the steel tubing produced consists essentially of, by weight: about 0.08% to about 0.11% carbon, about 1.03% to about 1.18%
manganese, about 0.15% to about 0.35% silicon, up to about 0.003% sulfur, up to about 0.012%
phosphorous, up to about 0.10% nickel, about 0.63% to about 0.73% chromium, about 0.40%
to.about 0.45% molybdenum, about 0.03% to about 0.05% vanadium, about 0.025% to about 0.035%
titanium, about 0.15% to about 0.30% copper, about 0.010% to about 0.050%
aluminum, up to about 0.05% niobium, up to about 0.15% residual elements, and the balance iron and incidental impurities.
26. The method of claim 23, wherein the finished steel tubing has a yield strength of at least about 125 ksi.
27. The method of claim 23, wherein the finished steel tubing has a yield strength of at least about 135 ksi.
28. The method of claim 23, wherein the finished steel tubing has a tensile strength of at least about 145 ksi.
29. The method of claim 23, wherein the finished steel tubing has an elongation at break of at least about 9%.
30. The method of claim 23, wherein the finished steel tubing has a hardness of no more than about 40 HRC.
31. The method of claim 23, wherein the finished steel tubing has a hardness of no more than about 37 HRC.
32. The method of claim 23, wherein the finished steel tubing has a ductile-to-brittle transition temperature below -60 °C.
33. The method of claim 23, wherein in the austenizing heating step, the steel tubing is heated to a temperature between about 920-1050 °C.
34. The method of claim 33, wherein in the austenizing heating step, the steel tubing is heated at a rate of at least about 200 °C per second.
35. The method of claim 23, wherein in the quenching step, the steel tubing is cooled at a rate of at least about 200 °C per second.
36. The method of claim 23, wherein in the tempering step, the steel tubing is tempered at a temperature between about 400-600 °C.
37. The method of claim 36, wherein in the tempering step, the steel tubing is tempered for about 4-20 minutes.
38. The method of claim 23, further comprising a finishing step wherein the tempered steel tubing is pickled, phosphated, and oiled.
39. A method of manufacturing a length of steel tubing for a stored gas inflator pressure vessel, comprising the following steps:
producing a length of tubing from a steel material consisting essentially of, by weight:
about 0.08% to about 0.11% carbon, about 1.03% to about 1.18% manganese, about 0.15%
to about 0.35% silicon, up to about 0.003% sulfur, up to about 0.012%
phosphorous, up to about 0.10% nickel, about 0.63% to about 0.73% chromium, about 0.40% to about 0.45%
molybdenum, about 0.03% to about 0.05% vanadium, about 0.025% to about 0.035%
titanium, about 0.15% to about 0.30% copper, about 0.010% to about 0.050%
aluminum, up to about 0.05% niobium, up to about 0.15% residual elements, and the balance iron and incidental impurities;
subjecting the steel tubing to a cold-drawing process to obtain desired dimensions;
austenizing by heating the cold-drawn steel tubing in an induction-type austenizing furnace to a temperature between about 920-1050 °C, at a heating rate of at least about 200 °C per second;
after the heating step, quenching the steel tubing in a water-based quenching solution until the tubing reaches approximately ambient temperature, at a cooling rate of at least about 200 °C per second; and, after the quenching step, tempering the steel tubing for about 4-20 minutes at a temperature between about 450-550 °C, a finishing step wherein the tempered steel tubing is pickled, phosphated, and oiled, wherein the finished steel tubing has a yield strength of at least about 135 ksi, a tensile strength of at least about 145 ksi, an elongation at break of at least about 9%, a hardness of no more than about 37 HRC, a ductile-to-brittle transition temperature below -60 °C and a good surface appearance.
CA2540000A 2003-10-10 2004-10-11 Low carbon alloy steel tube having ultra high strength and excellent toughness at low temperature and method of manufacturing the same Active CA2540000C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US50980603P 2003-10-10 2003-10-10
US60/509,806 2003-10-10
US10/957,605 US20050076975A1 (en) 2003-10-10 2004-10-05 Low carbon alloy steel tube having ultra high strength and excellent toughness at low temperature and method of manufacturing the same
US10/957,605 2004-10-05
PCT/IB2004/003311 WO2005035800A1 (en) 2003-10-10 2004-10-11 Low carbon alloy steel tube having ultra high strength and excellent toughnes at low temperature and method of manufacturing the same

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CA2540000A1 true CA2540000A1 (en) 2005-04-21
CA2540000C CA2540000C (en) 2012-05-15

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US (1) US20050076975A1 (en)
EP (1) EP1678335B1 (en)
JP (1) JP2007508452A (en)
KR (1) KR101178954B1 (en)
AT (1) ATE541060T1 (en)
BR (1) BRPI0415340B1 (en)
CA (1) CA2540000C (en)
WO (1) WO2005035800A1 (en)

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