http://www.ec21.com/ec-market/steel astm a283 gr c.html http://michellewang.en.ec21.com/Hot_Rolled_Steel_Coils--2674273_3658534.htmlA283 GR. C G3106 SM400A A570 GR. 30-40 G3132 SPHT1 A1011 SS GR. 30-40 SPHT2 SPHT3 General Structure G31020091228 http://rolexmetal.en.ec21.com/Hardox_400_Hardox_450_Hardox--2608939_3592502.htmlASTM A283 Grade A, B, C D, C-40, C-45, AISI 1045, C-60, C-70, EN-8, EN-9, AISI 4140, EN-19, AISI 4340, EN-24 We mainl20090606 http://richiego.en.ec21.com/Plate--1220266_1220292.htmlC AND ETC JIS STANDARD: SS41,50,55,SM41A/B/C,SM490A AND ETC ASTM STANDARD: A36,A283,A570 AND ETC. STEEL PLATE FOR INDUS20070508