AU755514B2 - Cast steel composition for railway components - Google Patents
Cast steel composition for railway components Download PDFInfo
- Publication number
- AU755514B2 AU755514B2 AU23456/99A AU2345699A AU755514B2 AU 755514 B2 AU755514 B2 AU 755514B2 AU 23456/99 A AU23456/99 A AU 23456/99A AU 2345699 A AU2345699 A AU 2345699A AU 755514 B2 AU755514 B2 AU 755514B2
- Authority
- AU
- Australia
- Prior art keywords
- alloy
- high strength
- maximum
- strength steel
- ksi
- 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.)
- Ceased
Links
Classifications
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Description
WO 00/44955 PCT/US99/01730 1 CAST STEEL COMPOSITION FOR RAILWAY COMPONENTS BACKGROUND OF THE INVENTION Field of Invention The present invention relates in general to cast steel alloys for railway car components.
More specifically, but without restriction to the particular use which is shown and described, this invention relates to an improved Grade B steel composition.
Description of the Related Art The Association of American Railroads sets forth guidelines requiring manufactured railway components, for example, truck bolsters, side frames, couplers, yokes and draft arms, to satisfy certain mechanical and chemical properties. Consistent with the needs of the railroad industry, the A.A.R. enumerates standards for the chemical composition ranges and the minimum mechanical properties of cast steel railcar components. Some of these steel standards for railcar components are classified broadly into the following categories: Grade A, Grade B, or Grade C steel. For Grade B steel, for example, the A.A.R. requires the following maximum chemical properties: Carbon 0.32%; Manganese 0.90% (Mn 1.20% when using the carbon reduction allowance); Silicon 1.50%; Phosphorus 0.04%; and Sulfur 0.04%. The A.A.R.
also requires for Grade B steel the resulting composition to exhibit the following mechanical properties: Ultimate Tensile Strength 70 KSI; Yield Strength 38 KSI; Elongation 24.0%; Reduction of Area 36.0%; and Charpy Impact values of 15 ft-lbs minimum at +200 F. These chemical and mechanical properties for Grade B steel are the minimally tolerable requirements for this grade of steel for the railway parts, assemblies and components manufactured under the A.A.R. specifications. However, depending on the application and customer needs, it is often desirable for Grade B steel railway components with improved strength and enhanced weldability. To this end, other alloys may be added to the above constituent alloy components to enhance the overall performance of the steel and still meet the A.A.R. minimum requirements.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an enhanced Grade B steel for casting railcar components, such as truck bolsters and side frames, which meets the A.A.R.
chemical specifications for Grade B steel yet exhibits better overall mechanical properties.
WO 00/44955 PCT/US99/01730 2 Briefly stated, the present invention involves a cast steel alloy which has the following chemical composition: Carbon 0.18 to 0.25%; Manganese 0.90 to 1.10%; Phosphorus 0.02% (maximum); Sulfur 0.015% (maximum); Silicon 0.30 to 0.60%; Nickel 0.50% (maximum); Chromium 0.20 to 0.35%; Molybdenum 0.08 to 0.12%; Aluminum 0.03 to 0.08%; Vanadium 0.06 to 0.12%; and residual components, such as, Calcium 0.0 to 1.0 Ib per ton. In the normalized state, the resulting composition exhibits the following mechanical properties: Ultimate Tensile Strength 85 KSI (minimum); Yield Strength 50 KSI (minimum); Elongation 24.0% (minimum); Reduction of Area 36.0% (minimum) and Brinell Hardness range 137-208.
The aforementioned chemical composition satisfies the A.A.R. specifications for Grade B steel and exhibits better mechanical properties, such as higher yield and tensile strengths. The resulting composition also exhibited Charpy Impact values that meet the A.A.R. Grade B minimum of 15 ft-lbs at +200 F while having the higher yield and tensile strengths. Secondary benefits of the inventive steel composition include better weldability The full range of objects, aspects and advantages of the invention are only appreciated by a full reading of this specification and a full understanding of the invention. Therefore, to complete this specification, a detailed description of the invention and the preferred embodiments follow.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to Tables 1 and 2, there is shown, in summary, the A.A.R. specification of the minimally tolerable chemical composition and mechanical requirements, respectively, for Grade B steel for use in railcar components: TABLE 1 Grade C Mn Si P S B 0.32 max 0.90 max 1.50 max 0.04 max 0.04 max TABLE 2 Tensile Yield Elongation Reduction of Grade Strength (psi) Point (psi) Area B 70,000 38,000 24 36 WO 00/44955 PCT/US99/01730 3 In a preferred embodiment of the present invention for use with casting of railway car components, the chemical composition ranges of the preferred steel alloy is as set forth in the table below: CHEMICAL COMPOSITION RANGES C Mn P S Si Ni Cr Mo Al V 0.18 0.90 0.30 0.20 0.08 0.03 0.06 0.25 1.10 0.02 .015 0.60 0.50 0.35 0.12 0.08 0.12 In addition to the above chemical constituents, Calcium may be added up to a maximum of one pound per ton. The preferred chemical composition exhibits the following mechanical properties which exceed the A.A.R. requirements for the railway car applications: MECHANICAL PROPERTIES Ultimate Tensile Yield Strength Elongation Reduction Brinell Strength (KSI) (KSI) of Area Hardness Range 50 24.0 36.0 137-208 Significantly, the above steel meets the A.A.R. Grade B steel minimum Charpy Impact value of 15 ft-lbs at +20' F and exhibits better mechanical properties, such as, higher tensile and yield strengths. To complement these enhanced mechanical properties, is the lower carbon content of 0.18 to 0.25% and the smaller alloy additions, which result in a steel that offers enhanced weldability over known steel compositions meeting Grade B requirements. This steel alloy also has a finer grain structure as compared to a plain carbon steel, which is normally used to fulfill Grade B specifications. The finer grain structure is believed to be beneficial to certain mechanical properties such as fatigue resistance. From a microstructure standpoint, the preferred composition forms carbide particles that are very hard, which in turn, pin the grain boundaries in place during heating resulting in less grain growth.
The preferred embodiments of the invention are now described as to enable a person of ordinary skill in the art to make and use the same. Variations of the preferred embodiment are P:\OPER\xd\2426795.RES.do -30)0902 -4possible without being outside the scope of the present invention. Therefore, to particularly point out and distinctly claim the subject matter regarded as the invention, the following claims conclude the specification.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
The reference to any prior art in this specification is not, and should not be taken 10 as, an acknowledgment or any form of suggestion that that prior art forms part of the .common general knowledge in Australia.
*oooo *oo *•go
Claims (8)
1. A high strength steel alloy with improved weldability for railway car components, the alloy having a composition comprising 0.18 to 0.25% C, 0.90 to 1.10% Mn, 0.30 to 0.60% Si, 0.20 to 0.35% Cr; 0.08 to 0.12% Mo, 0.03 to 0.08% Al, 0.06 to 0.12% V, a maximum of 0.02% P, a maximum of 0.015% S, and a maximum of 0.50% Ni, the alloy having a minimum tensile strength of 85 ksi and a minimum yield strength of 50 ksi.
2. The high strength steel alloy of claim 1 wherein the alloy has an elongation of 24%. 10
3. The high strength steel alloy of claim 1 wherein the alloy has a reduction of area of 36%.
4. The high strength steel alloy of claim 1 wherein the composition forms hard carbide particles that pin grain boundaries in place during heating resulting in less grain growth.
5. A high strength steel alloy with improved weldability for railway car components, the alloy having a composition comprising 0.18 to 0.25% C, 0.90 to 1.10% Mn, 0.30 to 0.60 Si, 0.20 to 0.35% Cr; 0.08 to 0.12% Mo, 0.03 to 0.08% Al, 0.06 to 0.12% V, a maximum of 0.02% P, a maximum of 0.015% S, a maximum of 0.50% Ni, and a residual component of Ca, the alloy having a minimum tensile strength of 85 ksi and a minimum yield strength of 50 ksi.
6. The high strength steel alloy of claim 5 wherein the alloy has an elongation of 24%.
7. The high strength steel alloy of claim 5 wherein the alloy has a reduction of area of 36%.
8. The high strength steel alloy of claim 5 wherein the composition forms hard carbide particles that pin grain boundaries in place during heating resulting in less grain growth. DATED: 30 September, 2002 cR4 30 by DAVIES COLLISON CAVE fr Patent Attorneys for the Applicant(s): BUCKEYE STEEL CASTINGS COMPANY
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1999/001730 WO2000044955A1 (en) | 1999-01-28 | 1999-01-28 | Cast steel composition for railway components |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2345699A AU2345699A (en) | 2000-08-18 |
AU755514B2 true AU755514B2 (en) | 2002-12-12 |
Family
ID=22272058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU23456/99A Ceased AU755514B2 (en) | 1999-01-28 | 1999-01-28 | Cast steel composition for railway components |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1155159A4 (en) |
CN (1) | CN1333840A (en) |
AU (1) | AU755514B2 (en) |
CA (1) | CA2353922C (en) |
WO (1) | WO2000044955A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100420768C (en) * | 2007-01-24 | 2008-09-24 | 中国重型汽车集团有限公司 | Low-alloy cast steel and method for preparing same |
CN100420766C (en) * | 2007-01-24 | 2008-09-24 | 中国重型汽车集团有限公司 | Cast steel and method for preparing same |
CN101845601B (en) * | 2009-03-26 | 2011-11-23 | 上海祝桥金属冲压延有限公司 | Ultrahigh strength cold rolled steel strip for automobile seat |
CN102094112B (en) * | 2009-12-09 | 2012-12-19 | 宁波金汇精密铸造有限公司 | Heat treatment process of alloy steel product |
CN101845592B (en) * | 2010-05-18 | 2011-12-28 | 南车戚墅堰机车车辆工艺研究所有限公司 | Low-alloy cast steel and smelting and heat treatment method thereof |
CN101880838A (en) * | 2010-06-13 | 2010-11-10 | 齐齐哈尔轨道交通装备有限责任公司 | Steel and car coupler made of steel |
CN103556067B (en) * | 2013-10-25 | 2016-04-27 | 南车长江车辆有限公司 | Rail vehicle bolster side frame foundry goods steel and preparation method thereof |
CN104032212B (en) * | 2014-06-13 | 2017-02-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for railway vehicle and preparation method of steel |
US9701323B2 (en) | 2015-04-06 | 2017-07-11 | Bedloe Industries Llc | Railcar coupler |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5996217A (en) * | 1982-11-24 | 1984-06-02 | Sumitomo Metal Ind Ltd | Manufacture of steel with superior sulfide cracking resistance |
JPS60114552A (en) * | 1983-11-25 | 1985-06-21 | Sumitomo Metal Ind Ltd | Steel for oil well pipe having superior resistance to sulfide stress corrosion cracking |
US5362338A (en) * | 1990-07-27 | 1994-11-08 | Aichi Steel Works Ltd. | Non-heat treating steel for hot forging |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0621319B2 (en) * | 1986-03-04 | 1994-03-23 | 愛知製鋼株式会社 | Non-heat treated steel for hot forging |
-
1999
- 1999-01-28 CN CN99815700.7A patent/CN1333840A/en active Pending
- 1999-01-28 CA CA002353922A patent/CA2353922C/en not_active Expired - Fee Related
- 1999-01-28 EP EP99903437A patent/EP1155159A4/en not_active Withdrawn
- 1999-01-28 WO PCT/US1999/001730 patent/WO2000044955A1/en active IP Right Grant
- 1999-01-28 AU AU23456/99A patent/AU755514B2/en not_active Ceased
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5996217A (en) * | 1982-11-24 | 1984-06-02 | Sumitomo Metal Ind Ltd | Manufacture of steel with superior sulfide cracking resistance |
JPS60114552A (en) * | 1983-11-25 | 1985-06-21 | Sumitomo Metal Ind Ltd | Steel for oil well pipe having superior resistance to sulfide stress corrosion cracking |
US5362338A (en) * | 1990-07-27 | 1994-11-08 | Aichi Steel Works Ltd. | Non-heat treating steel for hot forging |
Also Published As
Publication number | Publication date |
---|---|
CN1333840A (en) | 2002-01-30 |
WO2000044955A1 (en) | 2000-08-03 |
CA2353922A1 (en) | 2000-08-03 |
EP1155159A4 (en) | 2002-11-20 |
EP1155159A1 (en) | 2001-11-21 |
AU2345699A (en) | 2000-08-18 |
CA2353922C (en) | 2008-10-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2006332301B2 (en) | Deformable lightweight structural steel | |
AU755514B2 (en) | Cast steel composition for railway components | |
KR20070107166A (en) | Austenitic stainless steel | |
CA2994195C (en) | Impact resistant ductile iron castings | |
US6758919B2 (en) | Cast steel composition for railway components | |
US20100186855A1 (en) | Steel and processing method for the manufacture of high strength, fracture-splittable machinery components | |
WO2006121826A3 (en) | Cast iron with improved high temperature properties | |
JP3955719B2 (en) | Heat resistant steel, heat treatment method of heat resistant steel and heat resistant steel parts | |
JPH06220584A (en) | Steel composition for suspension spring | |
JP2636104B2 (en) | Tough spheroidal graphite cast iron | |
WO2009133920A1 (en) | High‑hardness shot material | |
MXPA01007621A (en) | Cast steel composition for railway components | |
RU2819029C1 (en) | Alloy steel used in production of railway rolling stock coupling devices | |
EP1228253B8 (en) | Steel composition, method for making same and parts produced from said compositions, particularly valves | |
US5516485A (en) | Weldable cast heat resistant alloy | |
US5817275A (en) | Steel plate having excellent corrosion resistance and sulfide stress cracking resistance | |
JP4134204B2 (en) | High cleanliness spring steel | |
KR102370219B1 (en) | Alloy steel composition for railway vehicle coupler | |
JPH06228713A (en) | Austenitic heat resistant cast steel excellent in strength at high temperature and machinability and exhaust system parts using same | |
JPS596358A (en) | High strength bolt | |
KR970021353A (en) | High Strength Alloy Compositions for Coil Springs | |
KR100256760B1 (en) | Aluminium alloy for automobile frame | |
US20020119070A1 (en) | Steel alloys for springs | |
JP2564657B2 (en) | Corrosion and wear resistant alloy steel | |
JPS6335756A (en) | Disk brake rotor material |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FGA | Letters patent sealed or granted (standard patent) | ||
PC | Assignment registered |
Owner name: COLUMBUS STEEL CASTINGS COMPANY Free format text: FORMER OWNER WAS: BUCKEYE STEEL CASTINGS COMPANY |
|
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |