Designation: A – 91 (Reapproved ) e1 Standard Speciﬁcation for Steel Bars, Alloy, Standard Grades 1 This s. See the chemical composition and physical properties of ASTM A Grade , find alternative materials, and connect with suppliers. Alloy Hot Rolled Round Steel Bar ASTM A Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are .
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Link to Active This link will always route to the current Active version of the standard. The report shall include the name of the manufacturer, ASTM designation and year aastm and revision letter, if any, type and grade, heat number, and size.
Hot-wrought alloy steel bars are produced in cut lengths and coils; the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition. This specification covers astk alloy steel bars.
ASTM A322 Grade 4140
The producer should be consulted in establishing the proper practice. Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. This abstract is a brief summary of the referenced standard.
Below you will find a comprehensive chart detailing each grade, their applications as well as measurements for each in ROUND shape. Originally published as A — 47 T. Aircraft Quality or Magna? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. These steels can be expected to contain 0.
Standard – Standard Specification for Steel Bars, Alloy, Standard Grades ASTM A –
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The primary melting may incorporate separate degassing or re? The quality requirements of individual application vary.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, or other imperfections which due to their nature, degree, or extent, will interfere with the use of the material ast, machining or fabrication of suitable parts. The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear.
Current edition approved Aug. This medium carbon, chromium-molybdenum, through-hardening alloy steel has a good hardenability with high strength and toughness as well as good fatigue and impact resistance after heat treating.
Your comments will receive careful consideration at a meeting of the responsible technical s322, which you may attend. The steel shall be furnished as strand cast or ingot cast.
Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Axle Shaft Quality S1. Sections and sizes of bar steel available are covered in Speci?
B Standard alloy steels can be produced with a lead range of 0. For best machining, it is often used in the annealed condition; however, when the amount of machining necessary is minimal or when the risk of distortion in heat treating a finished part is paramount, it is typically used in the quenched and tempered condition.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Referenced Documents purchase separately The documents listed below are referenced within the subject asmt but are not provided as part of the standard.
Historical Version s – view previous versions of standard.
ASTM A Standard Specification for Steel Bars, Alloy, Standard
Asm secondary melting is employed, the heat shall be de? A guide for the selection of steel bars is contained in Practice A If the usual titanium additive is not permitted, the steels can be expected to contain up to 0. It is the most widely used carburizing alloy. Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from astn single primary heat. Users of this standard are expressly advised that determination of the validity of axtm such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
The bars shall be free of pipe, cracks, and flakes. Hot-wrought alloy steel bars are produced in cut lengths and coils; the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition.
Immediately after hot forming, the bars shall be allowed to cool to a temperature below the critical range under suitable conditions to prevent imperfections caused by too rapid cooling. A number in parentheses indicates the year of last reapproval.
This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties.
Standard Specification for Steel Bars, Alloy, Standard Grades
The nickel content contributes to case toughness at high strength with above average core toughness. These elements are considered as incidental and may be present to the following maximum amounts: See Supplementary Requirement S9 or S The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting.
Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are required. The steel shall be made by one or more of the following primary processes: Last previous edition A — 90b. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear. It can be readily nitride for improved surface wear. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.