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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Grade compositions correspond to the respective AISI compositions. Current edition approved Aug. Historical Version s – view previous versions of standard.

ASTM A322 1991 Standard Specification for Steel Bars, Alloy, Standard Grades

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. 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.

Your comments will asfm careful consideration at a meeting of the responsible technical committee, which you may attend. ASTM International takes no position respecting the validity asmt any patent rights asserted in connection with any item mentioned in this standard.

Alloy Hot Rolled Round Steel Bar ASTM A | Wisconsin Steel & Tube

Originally published as A — 47 T. The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear. Hot rolled 3a22 bars are used when increased strength, toughness, wear resistance and fatigue resistance are required.


The bars shall be free of pipe, cracks, and flakes. The steel shall be made by one awtm more of the following primary processes: Grain Size Coarse S9. These elements are considered as incidental and may be present to the following maximum amounts: This specification covers hot-wrought alloy steel bars.

This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties. The nickel content contributes to case toughness at high strength with above average asstm toughness. Axle Shaft Quality S1.

See Supplementary Requirement S9 or S Cold Shearing Quality S3. 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 ashm heat treating.

This standard has been approved for use by agencies of the Department of Defense. The steel shall be furnished as strand cast or ingot cast. 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.

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.

Link to Active This link will always route asym the current Active version of the standard. Grain Size Fine S For best machining, a322 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.


Materials and Manufacture 5. 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. These steels can be expected to contain 0. Referenced Documents purchase separately The documents listed below are referenced within the subject 3a22 but are not provided as part of the standard.

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. Where secondary remelting is employed, zstm heat shall be defined as all of the cast product remelted from a single primary heat.

If the usual titanium additive is not permitted, the steels can be expected to contain up to 0.

Such steels are identi? A — 91 Reapproved e1 Standard Speci? Workmanship, Finish, and Appearance 7.