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ASTM A21

1994 Edition, February 15, 1994

Complete Document

Standard Specification for Carbon Steel Axles, Non-Heat-Treated and Heat-Treated, for Railway Use

Includes all amendments and changes through Reapproval Notice , 1999


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Product Details:

  • Revision: 1994 Edition, February 15, 1994
  • Published Date: January 1999
  • Status: Not Active, See comments below
  • Document Language: English
  • Published By: ASTM International (ASTM)
  • Page Count: 10
  • ANSI Approved: Yes
  • DoD Adopted: No

Description / Abstract:



1. Scope

1.1 This specification covers nonheat-treated axles up to and including those 6½ in. (165.1 mm) nominal diameter at the center and heat-treated axles of all sizes for freight cars, passenger cars, and locomotives.

1.2 This specification is for axles with machined bodies. For axles with as-forged bodies, see Specification A 383.

1.3 The grades of carbon steel axles are as follows:

1.3.1 Grade U--Nonheat-treated.

1.3.2 Grade F--Double normalized and tempered. (All freight axles over 6½ in. (165.1 mm) nominal diameter at the center shall be Grade F.)

1.3.3 Grade G--Quenched and tempered.

1.3.4 Grade H--Normalized, quenched, and tempered.

1.3.5 Grades F, G, and H axles are used in heavy-duty service on locomotives, cars, and other equipment.

1.4 Typical designs for plain and roller bearing axles are shown in the Manual of Standards and Recommended Practice of the Association of American Railroads.

1.5 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.

1.6 The values stated in inch-pound units are to be regarded as the standard.