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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It can be readily nitride ast improved surface wear. 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. Grain Size Fine S A number in parentheses indicates the year of last reapproval. Cold Shearing Quality S3.

Standard Specification for Steel Bars, Alloy, Standard Grades

Typical applications for hot rolled bar include gears, pinions, shafts, and other applications where it is helpful to have a232 steel that can be readily machined and carburized to controlled case depths. Such treatments must be speci?

A — 91 Reapproved e1 Standard Speci? Materials and Manufacture 5. ASTM Spec. 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 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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Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. Last previous edition A — 90b. Hot-wrought alloy steel bars are satm in cut lengths and asmt the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition. Cold Working Quality S4. 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.

Aircraft Quality or Magna? Originally published as A — 47 T. Axle Shaft Quality S1. 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.

Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

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It is the most widely used carburizing alloy.

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

These steels can be expected to contain 0. This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The steel shall be furnished as strand cast or ingot cast.

This specification covers hot-wrought alloy steel bars. 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 after heat treating.

Link to Active This link will always route to the current Active version of the standard. Workmanship, Finish, and Appearance 7.

The bars shall be free of pipe, cracks, and flakes. 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.

Sections and sizes of bar steel available are covered in Speci?