1.1 This specification covers nonheat-treated axles up to and including those 6 1/2 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 A383. 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 6 1/2 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. 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.

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This specification deals with the standard requirements for heat-treated alloy steel axles and solid design roller bearing axles with machined bodies for mass transit and commuter cars in electric and locomotive hauled railway service. Various axle designs are used for this service including motor and non-motor with either inboard or outboard journals. Materials shall be forged, cooled and heat treated by normalizing, liquid quenching, tempering, and straightening. Steels shall conform to chemical composition requirements specified for each of the seven classes considered here. Conformance to mechanical property requirements such as tensile strength, yield strength, elongation, and reduction of area, shall be evaluated by tensile tests. Details of nondestructive ultrasonic and magnetic particle examination procedures are discussed thoroughly. Final axle products shall conform to purchaser-specified size, shape, and finish. Rough machining shall be free of excessively rough ridges and coarse chatter marks, and the finish machined axle surfaces shall be free of injurious imperfections.1.1 This specification covers heat-treated carbon and alloy steel axles for mass transit and commuter cars in electric and locomotive hauled railway service.1.2 This specification is for solid design roller bearing axles with machined bodies.1.3 Various axle designs are used for this service including motor and non-motor with either inboard or outboard journals.1.4 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.1.5 Unless the order specifies the applicable “M” specification designation, the axles shall be furnished to the inch-pound units.1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

1.1 This specification covers eight grades of untreated and heat-treated carbon steel forgings and six grades of heat-treated alloy steel forgings for railway use. Note 1-Railway axles are covered by Specification A21. 1.2 The grades of carbon steel forgings and the purposes for which they are frequently used are as follows, the choice depending on design and stress or service to be imposed: 1.2.1 Grade A is untreated and is mostly used for drop forgings and parts of minor importance, and those which are to be case hardened. 1.2.2 Grade B is untreated and is used for a general group of miscellaneous ordinary forgings where heat treatment is not deemed necessary. 1.2.3 Grade C is annealed, normalized, or normalized and tempered. 1.2.4 Grade D is annealed, normalized, or normalized and tempered. 1.2.5 Grade E is normalized and tempered. 1.2.6 Grade F is double normalized and tempered. 1.2.7 Grade G is quenched and tempered. 1.2.8 Grade H is normalized, quenched, and tempered. 1.2.9 Grades E, F, G, and H forgings are used in high-duty service on locomotives, cars, and other equipment. 1.3 The grades of alloy steel forgings are as follows: 1.3.1 Grades I, J, and K are normalized and tempered. 1.3.2 Grades L, M, and N are normalized, quenched, and tempered, and are used in heavy-duty service on locomotives, cars, and special equipment. Note 2-The forgings described above were formerly designated as follows: Current Grade Former Designation and Grade A B C D E F G H I J K L M N A 236, A A 236, B A 236, C A 236, D A 236, E A 236, F A 236, G A 236, H A 238, A A 238, B A 238, C A 238, D A 238, E A 238, F 1.4 Supplementary Requirements (Sections S1 to S5) of an optional nature are provided. These shall apply only when specified by the purchaser. 1.5 The values stated in inch-pound units are to be regarded as the standard.

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4.1 The user of this standard shall be required to review and comply with the referenced “core” ASTM F24 Committee standards in 2.1 of this standard. Modified or alternate requirements to those standards may be required in this standard.4.1.1 Amusement railway sub-systems may be built to various scales, that is, rolling stock maybe to one scale and the track to another but have common gauge. The railroad’s documentation or maintenance manuals shall identify the railroad standards of the respective subsystems/interfaces.4.1.2 The Designer/Engineer’s requirements shall consider the track equipment manufacturer’s and rolling stock manufacturer’s requirements and shall determine their appropriate interfaces.1.1 This standard applies to design, manufacture, installation, operation, maintenance, and inspection of permanent amusement railway ride(s) that have a track gauge greater than or equal to 12 in. (305 mm) measured between the heads of the rails and their related devices and facilities, for example, bridges, tunnels, and signal support structures, excluding rolling stock. This “track” specific standard provides requirements which are not covered in the “core” or “supporting” standards of the ASTM F24 committee.1.2 This standard does not apply to track rides, such as roller coasters, that may resemble railways.1.3 This standard does not apply to funiculars as defined in ANSI B77.2 (2020) or BS EN 1907 (2017).1.4 This standard does not apply to Amusement Railway Rides and their associated track, devices and facilities that are manufactured and intended for use as a portable amusement ride or attraction.1.5 This standard does not apply to permanently installed amusement railway rides and tourist railways, and their associated track, devices and facilities that are under the jurisdiction of the United States Federal Railroad Administration (FRA) in whole or part, or national equivalent.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 843元 / 折扣价： 717 元 加购物车

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.1.1 This specification covers seven classes of carbon steel tires for railway and rapid transit use.1.1.1 Class A—For untreated driving tires for locomotives in passenger service.1.1.2 Class AHT—For heat-treated driving tires for locomotives in passenger service.1.1.3 Class B—For untreated driving tires for freight locomotives and tires for locomotive-truck, tender-truck, trailer and car wheels, and miscellaneous service.1.1.4 Class BHT—For heat-treated driving tires for freight locomotives and tires for trailer wheels.1.1.5 Class C—For untreated tires for switching locomotives.1.1.6 Class CHT—For heat-treated driving tires and switching locomotives and tires for locomotive-trucks, tender-trucks, trailer and car wheels, and miscellaneous service.1.1.7 Class DHT—For heat-treated driving tires for locomotives with light braking conditions, heavily loaded trailer tires, and rapid transit wheels where off-tread brakes are employed.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.1.4 Unless the order specifies the applicable “M” specification designation, the tires shall be furnished to the inch-pound units.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

4.1 The purpose of this practice is to delineate information and to establish procedures for the operation of an amusement railway ride.4.2 The user of this standard shall be required to review and comply with the referenced “core” ASTM Committee F24 standards in Subsection 2.1 of this standard. Modified or alternate requirements to those standards may be required in this standard.1.1 This practice applies to operations of amusement railway ride(s) that have a track gauge greater than or equal to 12 in. (305 mm) measured between the heads of the rails. This excludes patron powered ride vehicles specifically designed for children.1.2 This standard does not apply to the operation of rides, such as roller coasters, that resemble railways, but fall within the scope of Practice F2291-22a or Practice F1159-16ε1. This standard also does not apply to funiculars as defined in ANSI B77.2-20 or BS EN 1907-17.1.3 This standard does not apply to amusement railway rides operation that are intended for use as a portable amusement ride or attraction.1.4 This standard does not apply to permanently installed amusement railway rides and tourist railways, and their associated track, devices and facilities that are under the jurisdiction of the Federal Railroad Administration (FRA) in whole or part or national equivalent.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

1.1 This specification covers one-wear, two-wear, and multiple-wear cast carbon steel wheels for use on locomotives and cars, designated Class U, untreated, and Classes L, A, B, and C, heat-treated wheels. 1.2 The service for which the various classes are intended is as follows: 1.2.1 Class B or C wheels shall be used for freight cars in interchange service. 1.2.2 Class B or C wheels are recommended for use on locomotives. 1.2.3 For passenger car service, the various classes are intended generally as follows: 1.2.3.1 Class L -High speed with more severe braking conditions than other classes and light wheel loads. 1.2.3.2 Class A -High speed service with severe braking conditions, but moderate wheel loads. 1.2.3.3 Class B -High speed service with severe braking conditions and heavier wheel loads. 1.2.3.4 Class C -( ) Service with light braking conditions and heavier wheel loads. 1.2.3.5 Class C -( ) Service with heavier braking conditions where off-tread brakes are employed. 1.2.4 Class U -Wheels may be used in service in which the wheel load and braking are low. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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