... B, C; GR1,GR6; GR.A-1,GR.CChinese Standard GB 3087,GB 5310,GB 6479,GB ... Standard DIN 1629,DIN 17175Grade St 37.0,St 44.0,St 52.0,St35.8,St45.8,17Mn4,15Mo3,13CrMo44British standard BS ... 3059-1,BS 3059-2,Grade 320,360,440,243Japan Standard JIS G3454,JIS G3461 ... 340,STB 410,STB510,STB A12,STB A22European Standard EN 10216-1, EN 10216-2Grade P235TR1, P235GH, P265GH ...