Cold rolled steel coil(CRC) is one kind of low carbon steel.It's used widely.Induatrial includes all kinds of car,electric products,truck,air plane,precision instrument and building material and so on.TypeGradeChemical composition,% ,≤Yield strengthTensile strengthChinaCMnPSTiAltReL/MpaRm/MpaCommonDC010.120.500.0450.045≥0.020140~280270~410DrawDC030.100.450.0350.035≥0.020140~240270~370Deep drawDC040.080.400.0300.030≥0.020120~210270~350Special deep drawDC050.050.350.0250.025≥0.015120~180270~330Deeper drawDC060.020.300.0200.0200.30≥0.015110~170270~330Special deeper drawDC070.010.250.0200.0200.20≥0.015100~150250~310TypeGradeThickness(mm)/Elongation rate(L0=80mm,b=20mm),%,≥Plastic strain ratioStrain hardening indexChina＜0.40.4~＜0.60.6~＜1.01.0~＜1.6≥1.6r90n90CommonDC012628303234DrawDC033032343536≥1.3Deep drawDC043436383940≥1.6≥0.18Special deep drawDC053538404041≥1.9≥0.2Deeper drawDC063739414142≥2.1≥0.22Special deeper drawDC074042444444≥2.5≥0.23