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 quality requirements of individual application vary. This low carbon nickel chromium molybdenum alloy is a low cost steel with good carburized properties. 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 asrm case depths. It can be readily nitride for improved surface wear. The need for 0.
Standard – Standard Specification for Steel Bars, Alloy, Standard Grades ASTM A –
Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear.
Such treatments must be speci? 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. Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, aastm 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.
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. Grain Size Coarse S9. For best machining, it is often used in the annealed condition; however, when the amount of machining necessary is minimal or when the risk aastm distortion in heat treating a finished part is paramount, it is typically used in the quenched and tempered condition.
Where minimum and maximum sulfur contents are shown, it is indicative of resulfurized steel Silicon may be speci? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
See Supplementary Requirement S9 or S Below you will find a comprehensive chart detailing each grade, their applications as well as measurements for each in ROUND shape. Your comments will receive careful consideration at a meeting of the ashm technical committee, which you may attend. This abstract is a brief summary of the referenced standard. 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.
ASTM A322 1991 Standard Specification for Steel Bars, Alloy, Standard Grades
The steel shall be made by one or more of the asttm primary processes: Historical Version s – view previous versions of standard. Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. Grade compositions correspond to the respective AISI compositions. Aircraft Quality or Magna? Cold Working Quality S4.
ASTM Spec. Originally published as A — 47 T.
This specification covers hot-wrought alloy steel bars. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
The report shall include the name of the manufacturer, A3322 designation and year date and revision letter, if any, type and grade, heat number, and size. The primary melting may incorporate separate degassing or re?
The chromium and molybdenum support the proper formation of carbides resulting in good surface hardness and wear. Last previous edition A — 90b. 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. 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.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
The bars shall be free of pipe, cracks, and flakes. Axle Shaft Quality S1. These steels can be expected to contain 0. Sections and sizes of bar steel available a232 covered in Speci?
It is the most widely used carburizing alloy.