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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Grain Size Fine S Axle Shaft Astk S1. Workmanship, Finish, and Appearance 7. Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear. 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.
Below you will find a comprehensive chart detailing each grade, their applications as well as measurements for each in ROUND shape. Hot-wrought alloy steel bars are produced in cut asm and coils; the manufacturer should aastm consulted regarding sections and sizes available in coils, produced to a chemical composition.
Sections and sizes of bar steel available are covered in Speci? Such steels are identi?
These steels can be expected to contain 0. It can be readily nitride for improved surface wear. This abstract is a brief summary of the referenced standard. Last previous edition A — 90b. Materials and Manufacture 5. Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1.
Link to Active This link will always route to the current Active version of the standard. The producer should be consulted in establishing the proper practice. ASTM does not give any warranty express or implied or make any representation that the contents of atm abstract are accurate, complete or up to date.
The quality requirements of individual application vary. Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, or other qstm which due to their nature, degree, or extent, will interfere with the use of the material in machining or fabrication of suitable parts.
Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. The bars shall be free of pipe, cracks, and flakes. The need for 0.
ASTM A Standard Specification for Steel Bars, Alloy, Standard
Such treatments must be speci? The steel shall be furnished as strand cast or ingot cast. 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. Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat.
ASTM A322 1991 Standard Specification for Steel Bars, Alloy, Standard Grades
The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Where secondary melting is employed, the heat shall be de?
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. Grade compositions correspond to the respective AISI compositions. A number in parentheses indicates the year of last reapproval.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. If the usual titanium additive is not permitted, the steels can be expected to contain up to 0.
Referenced Asttm purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. ASTM Spec. 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.
Cold Working Quality S4. This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties. Current edition approved Aug. Qstm report shall include the name of the manufacturer, ASTM designation and year date and revision letter, aastm any, type and grade, heat number, and size.