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This specification details the standard requirements for carbon steel tires for railway and rapid transit applications. The seven classes of steel tires covered here are: Class A-untreated driving tires for locomotives in passenger service; Class AHT-heat-treated driving tires for locomotives in passenger service; Class B-untreated driving tires for freight locomotives and tires for locomotive-truck, tender-truck, trailer and car wheels and miscellaneous service; Class BHT-heat-treated driving tires for freight locomotives and tires for trailer service; Class C-untreated tires for switching locomotives; Class CHT-heat-treated driving tires and switching locomotives and tires for locomotive-trucks, tender-trucks, trailer and car wheels, and miscellaneous service; and Class DHT-heat-treated driving tires for locomotives with light braking conditions, heavily loaded trailer tires, and rapid transit wheels where off-tread brakes are employed. Tires shall be tested and conform to required chemical composition and Brinell hardness values. Reheat treatment and retests may be done if any of the tires fail to meet the specified property values.
This abstract is a brief summary of the referenced standard. 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. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.2 Supplementary requirements, including those in the general requirements of Specification A788/A788M, are provided for use when additional testing or inspection is desired. These shall apply only when specified individually by the purchaser in the order.
1.3 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 standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A788/A788M Specification for Steel Forgings, General Requirements
AAR StandardAARM-107/M-208 Wheels, Carbon Steel Available from Association of American Railroads (AAR), 425 Third St., SW, Washington, DC 20024, http://www.aar.org.
ICS Number Code 45.040 (Materials and components for railway engineering)
UNSPSC Code 81101511(Railway engineering)