1.1 This specification covers steel joint bars for connecting steel rails in mine, industrial, and standard railroad track. 1.2 Three grades of joint bars are defined for applications where non-heat treated bars are sui This specification covers steel joint bars of low-carbon, medium-carbon, and high-carbon grades (Grades 1, 2, and 3) for railway applications. Steel shall be made through basic-oxygen or electric-furnace processes and cast through continuous process or