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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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 q322 a chemical composition.

ASTM A322 Grade 4140

Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear. This standard has been approved for use by agencies of the Department of Defense. The steel shall be furnished as strand cast or ingot axtm. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

The report shall include the name of the manufacturer, ASTM designation and year date and revision letter, if any, type and grade, heat number, and size. Such steels are identi?

The producer should be consulted astn establishing the proper practice.

Link to Active This ast, will always route to the current Active version of the standard. Originally published as A — 47 T. Aircraft Quality or Magna? Such treatments must be speci? Axle Shaft Quality S1. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.


Where minimum and maximum sulfur contents are shown, it is indicative of resulfurized steel Silicon may be speci? This specification covers hot-wrought alloy steel bars.

Typical applications for hot rolled bar include gears, pinions, shafts, and other applications where it is helpful to have a steel that can be readily machined and ast to controlled case depths.

See Supplementary Requirement S9 or S Grade compositions correspond to the respective AISI compositions. Current edition approved Aug. Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1.

Individual reprints single or multiple copies of x322 standard may be obtained by contacting ASTM at the above a232 or at phonefaxor service astm. Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. The bars shall be free of pipe, cracks, and flakes.

ASTM A – 13() Standard Specification for Steel Bars, Alloy, Standard Grades

The steel shall be made by one or more of the following primary processes: Where secondary melting is employed, the heat shall be de? ASTM Spec. 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 in machining or fabrication of suitable parts.

The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. 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.


Historical Version s – view previous versions of standard. These elements are considered as incidental and may be present to the following maximum amounts: This abstract is a brief summary of the referenced standard.

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.

ASTM A Standard Specification for Steel Bars, Alloy, Standard

A number in parentheses indicates the year of last reapproval. 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. The need for 0. 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. The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear.

It is the most widely used carburizing alloy. Grain Size Fine S The quality requirements of individual application vary.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are required.

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