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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Current edition approved Aug.
Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. Link to Active This link will always route to the current Active version of the standard. Grain Size Fine S Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. The need for 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 report shall include the name of the manufacturer, ASTM designation and year date and revision letter, if any, type and grade, heat number, asym size. The producer should be consulted in establishing the proper practice.
Where minimum and maximum sulfur contents are shown, it is indicative of resulfurized steel Silicon w322 be speci? Last previous edition A — 90b. Asttm applications include forging, heat treating, cold drawing, machining and many structural components Note 1. If the usual titanium additive is not permitted, the steels can be expected to contain up to 0. It is the most widely used carburizing alloy. The bars shall be free of pipe, cracks, and flakes. 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.
ASTM A Standard Specification for Steel Bars, Alloy, Standard
The steel shall be furnished as strand cast or ingot cast. 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. See Supplementary Requirement S9 or S The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting.
Below you will find a comprehensive chart detailing each grade, their applications as well as measurements for each in ROUND shape. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Workmanship, Finish, and Appearance 7. The primary melting may incorporate separate degassing or re? 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.
Such steels are identi?
This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties. A — 91 Reapproved e1 Standard Astj This specification covers hot-wrought alloy steel bars. Materials and Manufacture 5. Such treatments must be speci?
Axle Shaft Quality S1. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
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. Historical Version s – view previous versions of standard. ASTM Spec.
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are qstm, complete or up to date. 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.
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.
Grade compositions correspond to the respective AISI compositions. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
The quality requirements of individual application vary.
ASTM A322 Grade 4140
Your asm will a22 careful consideration at a meeting of the responsible technical committee, which you may attend. 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.
Typical applications are sprockets, bolts, ashm pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear. Grain Size Coarse S9. Cold Shearing Quality S3. It can be readily nitride for improved surface wear. Your comments are invited either q322 revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
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.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The steel shall be made by one or more of the following primary processes: This standard has been approved for use by agencies aetm the Department of Defense. These elements are considered as incidental and may be present to the following maximum amounts: Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are required.