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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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Link to Active This link will always route to the current Active version of the standard. This abstract is a brief summary of the referenced standard.

The producer should be consulted in establishing the proper practice. Grain Size Coarse S9.

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

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties.

A superscript epsilon e indicates an editorial change since the last revision or reapproval.

A guide for the selection of steel bars is contained in Practice A Current edition approved Aug. Materials and Manufacture 5. Such steels are identi?

A number in parentheses indicates the year of last reapproval. If the usual titanium additive is not permitted, the steels can be expected to contain up to 0. Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear.

Cold Shearing Quality S3. These elements awtm considered as incidental and may be present to the following maximum amounts: Grain Size Fine S Below you will find a comprehensive chart detailing each grade, their applications as well as measurements for each in ROUND shape.


This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Typical applications for hot rolled bar include gears, pinions, shafts, and other applications where it is asrm to have a steel atm can be readily machined and carburized to controlled case depths.

Within the limits of good manufacturing and inspection a32, 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 melting is employed, the heat shall be de? It can be readily nitride for improved surface wear. The need for 0. The steel shall be furnished as strand cast or ingot cast.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Such treatments must be speci? Cold Working Quality A32.

ASTM A – 07 Standard Specification for Steel Bars, Alloy, Standard Grades

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. Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. Workmanship, Finish, and Appearance 7. ASTM Spec. For best machining, it is often used in the annealed s322 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.

Last previous edition A — 90b.

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. Referenced Documents asstm separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Axle Shaft Quality S1. It is the most widely used carburizing alloy.


Historical Version s – view 3a22 versions of 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.

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

See Supplementary Requirement S9 or S Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. B Standard alloy steels can be produced with a lead range of 0. The nickel content contributes to case toughness at high strength with above average core toughness.

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract a3222 accurate, complete or up to date. Where secondary remelting is employed, the heat shall be defined as all of the cast product z322 from a single primary heat. Grade compositions correspond to the respective AISI compositions. These steels can be expected to contain 0. 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.

The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear. Immediately after hot forming, the bars shall be allowed to cool to a temperature below the critical range under a3222 conditions to prevent imperfections caused by too rapid cooling.

A — 91 Reapproved e1 Standard Speci?