ASTM A2-02(R2020) pdf free download
ASTM A2-02(R2020) pdf free download.Standard Specification for Carbon Steel Girder Rails of Plain, Grooved, and Guard Types
1. Scope
1.1 This specification covers carbon steel girder rails 2 of three classes based on type or type and weight, and chemistry defined as follows and in Table 1. 1.1.1 Unless otherwise specified by the purchaser, girder- guard rails shall be Class A. 1.1.2 Plain and grooved-girder rails under 135 lb/yd (67.1 kg/m) in weight shall be specified by the purchaser as either Class A or Class B. 1.1.3 Plain and grooved-girder rails of 135 lb/yd in weight and heavier shall be Class C, unless otherwise specified. 1.2 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. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Classification of Rails
3.1 No. 1 Rails—Rails that are free of injurious imperfec- tions and flaws of all kinds. 3.2 No. 2 Rails—Rails that contain surface imperfections in such number or ofsuch character that shall not, in the judgment of the inspector, render them unfit for recognized uses.
4. Ordering Information
4.1 Orders for girder rails under this specification shall include the following information as appropriate: 4.1.1 ASTM designation and date of issue; 4.1.2 Quantity (tons or pieces as appropriate); 4.1.3 Complete identification of section with dimensional drawing if required; 4.1.4 Arrangement of bolt holes, bond holes, and tie rod holes with dimensional drawings, if required; 4.1.5 Class (in accordance with 1.1 and Table 1); and 4.1.6 Certification and Test Report (see 12.1).
5. Manufacture
5.1 Melting Practice—The steel shall be made by any of the following processes: open-hearth, basic-oxygen, or electric- furnace. 5.1.1 The steel may be cast by a continuous process or in ingots. 5.2 Discard—Sufficient discard shall be made to secure freedom from injurious segregation and piping.
6. Chemical Composition
6.1 Heat or CastAnalysis—An analysis for each heat or cast of steel shall be made by the manufacturer to determine the percentage of the elements specified in Table 1. The analysis shall be made from a test sample representing the heat or cast and shall conform to the requirements in Table 1. 6.2 Upon request by the purchaser, similar samples shall be provided to verify the heat or cast analysis as determined in 6.1. 6.3 Product Analysis—When ladle tests are not available, finished material representing the heat may be product tested.
7. Hardness Properties
7.1 Test Specimens: 7.1.1 Three representative sections of rail from each heat shall be selected as test specimens. 7.1.2 Excess scale and decarburization shall be removed from the test area ofthe head or web ofthe selected specimens. 7.2 Procedure: 7.2.1 The test shall be conducted in accordance with Test Method E10. 7.3 Requirements: 7.3.1 Class A rail shall have a Brinell hardness of 248 to 293, and Classes B and C shall have hardnesses of 269 to 321. 7.4 Retests—If the average depth of the impressions ob- tained on the head of the three specimens from any heat fails to conform to the requirements specified in 7.3, the manufac- turer may at his option retest the specimens, or each rail from that heat. Rails represented by retests which conform to the requirements of 7.3 shall be accepted.
8. Permissible Variations of Dimension, Weight, and Other Physical Attributes 8.1 Section:
8.1.1 The section of the rail shall conform to the design specified by the purchaser. 8.1.2 A variation of 1 ⁄ 64 in. (0.4 mm) less or 1 ⁄ 32 in. (0.8 mm) greater than the specified height will be permitted. 8.1.3 A variation of 1 ⁄ 8 in. (3.2 mm) from the specified overall width of the head and tram will be permitted, but any variation that would affect the gage line more than 1 ⁄ 32 in. (0.8 mm) will not be permitted. 8.1.4 The overall width of the base shall not vary under that specified more than 1 ⁄ 8 in. (3.2 mm) for widths less than 6 1 ⁄ 2 in. (165 mm), 3 ⁄ 16 in. (4.8 mm) for a width of 6 1 ⁄ 2 in., and 1 ⁄ 4 in. (6.35 mm) for a width of 7 in. (178 mm). 8.1.5 No variation will be permitted in dimensions affecting the fit of the joint bars, except that the fishing template approved by the purchaser may stand out laterally not more than 3 ⁄ 32 in. (2.4 mm). 8.1.6 The base of the rail shall be at right angles to the web, and the convexity shall not exceed 1 ⁄ 32 in. (0.8 mm). 8.1.7 When necessary, because of the type of track construction, and notice to that effect has been given to the manufacturer, the position of the gage line with respect to the outer edge of the base shall not vary more than 3 ⁄ 64 in. (1.2 mm).
