Cold Rolled Steel (CR)

Cold Rolled Steel (CR)

Cold Rolled steel is produced by pickling a hot coil and rolling it uniformly at an appropriated temperature to a thinner thickness. It has excellent surface configuration and superb mechanical properties for use in automobile and electronic appliance production.

Quality Specifications

제품특성
Classification KSE3512 JIS G3141 ASTM A1008 EN10130
CQ(Commercial Quality) SPCC SPCC CS DC01(Fe P01)
DQ(Drawing Quality) SPCD SPCD DS DC03(Fe P03)
DDQ(Deep Drawing Quality) SPCE SPCE DDS DC04(Fe P04)
DDQ-N(StabilizedDeep Drawing Quality) SPCEN SPCEN DDS DC04(Fe P04)
EDDQ - - EDDS DC05(Fe P05)

Hardness Test Comparison

제품특성
Rockwell Hardness Vickers
Hardness		 Rockwell Hardness Vickers
Hardness
B Scale F Scale Superficial B Scale F Scale Superficial
HB HF H30T H15T Hv HB HF H30T H15T Hv
100 113.3 80.8 90.6 235 75 99.3 64.8 82.8 140
99.5 113.0 80.5   232 74.5 99.0 64.4   138
99 112.7 80.1 90.3 229 74 98.7 64.1 82.5 137
98.5 112.4 79.8   227 73.5 98.5 63.8   136
98 112.1 7.5 90.0 224 73 98.2 63.5 82.2 134
97.5 111.9 79.2   221 72.5 97.9 63.2    
97 111.6 78.9 89.7 218 72 97.6 62.8 81.9 132
96.5 111.3 78.5   216 71.5 97.3 62.5   131
96 111.0 78.2 89.4 214 71 97.1 62.2 81.6 129
95.5 110.7 77.9   221 70.5 96.8 61.9   128
95 110.5 77.6 89.1 209 70 96.5 61.6 81.3 127
94.5 110.2 77.3   207 69 95.9 60.9 81.0  

Dull Finish

Dull finish, which is attained by attaching numerous fine grains onto the steel surface, is often called "pear-skin finish" or "egg-shell texture".The grains are made by steel grit blasted roll. The dull finish is useful in drawing because lubricant oil can be evenly spread over the entire surface, thereby reducing the possibility of friction. The fine grains also help boost paint adherence and extend the steel life span of the steel

Bright Finish

Bright finish presents high-quality roughness that is optimal for decorative purpose. The sheet surface is rolled with fine polished rolls.

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