Active Standard ASTM A504 / A504M | Developed by Subcommittee: A01.06
Book of Standards Volume: 01.05
Historical (view previous versions of standard)
This specification deals with one-wear, two-wear, and multiple-wear wrought carbon steel wheels for locomotives and cars. The classes of steel wheels according to passenger car service covered here are: Class L, which are for high speed services with more severe braking conditions than other classes and light wheel loads; Class A, which are for high speed services with more severe braking conditions, but moderate wheel loads; Class B, which are for high speed services with severe braking conditions and heavier wheel loads; Class C (1), which are for services with light braking conditions and heavier wheel loads; and Class C (2), which are for services with heavier braking conditions where off-tread brakes are employed. Class B and C wheels shall be used for freight cars in interchange service, and are recommended for use on locomotives. Wheels shall be treated by rim-quenching and shot peening, and shall be finished by rough boring and machining. Heat analysis and rim hardness measurement procedures shall be performed to evaluate the conformance of wheel specimens with chemical composition and Brinell hardness requirements, respectively. Materials shall also go through nondestructive ultrasonic and magnetic particle examinations. Finally, customary product marking procedures shall be followed.
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1.4 Supplementary requirements included in Specification A788/A788M may be specified by the purchaser for forgings ordered to this specification.
1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text and tables, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A275/A275M Practice for Magnetic Particle Examination of Steel Forgings
A388/A388M Practice for Ultrasonic Examination of Steel Forgings
A788/A788M Specification for Steel Forgings, General Requirements
SAE DocumentsSAEJ442 Test Strip, Holder and Gage for Shot Peening SAEJ443 Recommended Practice for Procedures for Using Standard Shot Peening Test Strip SAEJ827 Recommended Practice for Cast Steel Shot
Military StandardMIL-S-13165B Shot Peening of Metal Parts Available from Standardization Document Order Desk, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
AAR StandardAARM-107/M-208 Wheels, Carbon Steel Available from Association of American Railroads (AAR), 425 Third Street, SW, Washington, DC 20024, http://www.aar.org.
ICS Number Code 43.040.50 (Transmissions, suspensions)
UNSPSC Code 25171900(Wheels and wheel trims)