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Materials and Manufacture 5. The chromium and molybdenum support qstm proper formation of carbides resulting in good surface hardness and wear.

Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are required. These elements are considered as incidental and may be present to the following maximum amounts: 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.

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. The steel shall be furnished as strand cast or ingot cast. Axle Shaft Quality S1. The primary melting may incorporate separate degassing or refining a may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. Such treatments must be speci?

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 asrm quenched and tempered condition. Bar applications include forging, heat treating, cold drawing, machining and many structural components Note 1. 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.

Current edition approved Aug. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Grain Size Coarse S9. Below you will find a comprehensive chart detailing each grade, their applications as well as measurements for each in ROUND shape. Your comments are invited either for asym of this standard or for additional standards and should be addressed to ASTM International Headquarters.

This specification covers hot-wrought alloy steel bars. 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 nickel content contributes to case toughness at high strength with above average core toughness.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Bar applications include forging, heat treating, cold drawing, machining ashm many structural components Note 1. ASTM Spec. Typical applications are sprockets, bolts, chain pins, drill collars, universal joints, highly stressed parts or parts subject to severe wear.

Originally published as A — 47 T. 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. The bars shall be free of pipe, cracks, and flakes.

It is the most widely used carburizing alloy. 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. A number in parentheses indicates the year of last reapproval. Typical applications would be camshafts, axles, shafts, pistons, gears and bearings. 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.

Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. Aircraft Quality or Magna?

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Materials and Manufacture 5. The chromium and molybdenum support qstm proper formation of carbides resulting in good surface hardness and wear. Hot rolled alloy bars are used when increased strength, toughness, wear resistance and fatigue resistance are required. These elements are considered as incidental and may be present to the following maximum amounts: 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. 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. The steel shall be furnished as strand cast or ingot cast.

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