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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The producer should be consulted in establishing the proper practice. Grade compositions correspond to the respective AISI compositions. Such steels are identi?
Standard Specification for Steel Bars, Alloy, Standard Grades
ASTM International takes no position ast, the validity of any patent rights asserted in connection with any item mentioned in this standard. This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties.
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. It is the most widely used carburizing alloy.
Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. The quality requirements of individual application vary. It can be readily nitride for improved surface wear. The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear.
Immediately after hot forming, the bars shall be allowed to cool atm 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.
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 bars shall be free of pipe, cracks, and flakes.
ASTM A322 Grade 4140
For best machining, it is often used in wstm annealed condition; however, when the amount astk 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. A number in parentheses indicates the year of last 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.
B Standard alloy steels can be produced with a lead range of 0. Z322 treatments must be speci? Historical Version s – view previous versions of 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. Where secondary melting is employed, the heat shall be de? Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1.
A guide for the selection of steel bars is contained in Practice A Originally published as A — 47 T.
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. A — 91 Reapproved e1 Standard Speci? A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are required.
Alloy Hot Rolled Round Steel Bar ASTM A | Wisconsin Steel & Tube
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.
Cold Shearing Quality S3. The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. The primary melting may incorporate separate degassing or re?
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 steel shall be made by one or more of the following primary processes: Axle Shaft Quality S1. 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.