... are controled from the material,our material are from TAIYUAN IRON&STEEL(GROUP)C Our company's cold rolled steel coil ... are controled from the material,our material are from TAIYUAN IRON&STEEL(GROUP)CO.,LTD.which was used by high grade ... + 2MM / - 2MMstandardJIS,AISI,ASTM,GB,BS,DINApplication:High Grade Security Door, Construction Material, and so on