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. 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 producer should be consulted in establishing the proper practice. 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 asmt controlled case depths. Where minimum and maximum sulfur contents are shown, it is indicative of resulfurized steel Silicon may be speci?
Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. This standard has been approved for use by agencies of the Department of Defense. Astn and Manufacture 5. Aircraft Quality or Magna? The steel shall be furnished as strand cast or ingot cast.
These elements are considered as incidental and may be present to the following maximum amounts: The primary melting may incorporate separate degassing or re? Current edition approved Aug. Last previous edition A — 90b. Cold Working Quality S4. 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. This abstract is a brief summary of the referenced standard.
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.
Grain Size Fine S Sections and sizes of bar steel available are covered in Speci?
ASTM A322 1991 Standard Specification for Steel Bars, Alloy, Standard Grades
Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. It is the most widely used carburizing alloy.
A guide for the selection of steel bars is contained in Practice A Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Cold Shearing Quality S3.
ASTM A322 Grade 4140
Grade compositions correspond to the respective AISI compositions. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
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. Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, or other imperfections which are due to their nature, degree, or extent, will interfere with the use of the material in machining or fabrication of suitable parts.
The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear.
ASTM A – 13() Standard Specification for Steel Bars, Alloy, Standard Grades
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. These steels can be expected to contain 0. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Workmanship, Finish, and Appearance 7. The need for 0. It can be readily nitride for improved surface wear. 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. If the usual titanium additive is not permitted, the steels can be expected to contain up to 0.
astk A superscript epsilon e indicates an editorial change since the last revision or reapproval. 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.
The bars shall be free of pipe, cracks, and flakes.