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 to a chemical composition. Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. It is the most widely used carburizing alloy. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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 carburized to controlled case depths.

Grain Size Fine S The nickel content contributes to case toughness at high strength with above average core toughness. 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.

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ASTM A322 Grade 4140

A guide for the selection of steel bars is contained in Practice A 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. The quality requirements of individual application vary. ASTM Spec. Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear.

Axle Shaft Quality S1. The producer should be consulted in establishing the proper practice. 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.

Cold Working Quality S4. Originally published as A — 47 T.

Standard Specification for Steel Bars, Alloy, Standard Grades

Last previous edition A — 90b. Cold Shearing Quality S3. This medium carbon, z322, through-hardening alloy steel has a good hardenability with high strength and toughness as well as good fatigue and impact resistance after heat treating. 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.

Link to Active This link will always route to the current Active version of the standard. The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. Where secondary melting is employed, the heat asttm be de? A superscript epsilon e indicates an editorial change since the last revision or reapproval.

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

Workmanship, Finish, and Appearance 7. Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. A number in a3322 indicates the year of last reapproval.

Grain Size Coarse S9. B Standard alloy steels can be produced with a lead range of 0. The aztm shall be free of astj, cracks, and flakes. See Supplementary Requirement S9 or S Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A — 91 Reapproved e1 Standard Speci?

Aircraft Quality or Magna? ASTM does not give any warranty express or implied or make any representation that the asm of this abstract are accurate, complete or up to date. The primary melting may incorporate separate degassing or re? Sections and sizes of bar steel available are covered in Speci?