ASTM A21-94(1999) PDF

Scope: 1.1 This specification covers nonheat-treated axles up to and including those 61⁄2 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 61⁄2 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.2 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.

ASTM A21-94(1999) Referenced Document

ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products*， 2001-12-10 Update
ASTM E112 Standard Test Methods for Determining Average Grain Size*， 1996-04-20 Update
ASTM E127 Standard Practice for Fabricating and Checking Aluminum Alloy Ultrasonic Standard Reference Blocks*， 1998-04-20 Update
ASTM E381 Standard Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings*， 1998-04-20 Update

1970 ASTM A21-94(1999) Standard Specification for Carbon Steel Axles, Non-Heat-Treated and Heat-Treated, for Railway Use