Cold Rolled Steel Sheet & Coil(CR)

1. Classification and Chemical Composition (Only for Reference) Class Symbol Quality chemical composition % C Si Mn P S Class 1 SPCC Commercial Quality 0.12 Max - 0.50 Max. 0.040 Max. 0.045 Max. Class 2 SPCD Drawing Quality 0.10 Max - 0.45 Max. 0.035 Max. 0.035 Max. Class 3 SPCE Deep Drawing Quality 0.08 Max - 0.40 Max. 0.030 Max. 0.030 Max. Remarks Where the value obtained by the tension test and or Erichsen value are guaranteed by the order of purchaser for Class 1 sheet or strip normally refined or as it is annealed, its symbol for classification shall be SPCCT, which has a suffix T at the end. Where the non-aging is guaranteed by the order of purchaser for Class 3 sheet or strip normally refined or as it is annealed, its symbol for classification shall be SPCEN, which has a suffix N at the end. 2. Permissible Variations in Dimensions & Shapes. (unit : mm) 1. Thickness Tolerances Divison by nominal width Divison by nominal thickness Under 630 630 to 1,000, excl 1,000 to 1,250, excl. 1,250 to 1,600, excl. 1,600 and over under 0.25 ± 0.03 ± 0.03 ± 0.03 - - 0.25 to 0.40, excl. ± 0.04 ± 0.04 ± 0.04 - - 0.40 to 0.60, excl. ± 0.05 ± 0.05 ± 0.05 ± 0.06 - 0.60 to 0.80, excl. ± 0.06 ± 0.06 ± 0.06 ± 0.07 ± 0.08 0.80 to 1.00, excl. ± 0.07 ± 0.07 ± 0.07 ± 0.09 ± 0.10 1.00 to 1.25, excl. ± 0.08 ± 0.08 ± 0.09 ± 0.10 ± 0.12 1.25 to 1.60, excl. ± 0.09 ± 0.10 ± 0.11 ± 0.12 ± 0.14 1.60 to 2.00, excl. ± 0.10 ± 0.11 ± 0.12 ± 0.14 ± 0.16 2.00 to 2.50, excl. ± 0.12 ± 0.13 ± 0.14 ± 0.16 ± 0.18 2.50 to 3.15, excl. ± 0.14 ± 0.15 ± 0.16 ± 1.18 ± 0.20 3.15 and over. ± 0.16 ± 0.17 ± 0.19 ± 0.20 - 2. Width Tolerances Division by nominal width Under 1,250 1,250 and over +70 +10 3. Length Tolerances Division by nominal length Tolerance Under 2,000 +100 2,000 to 4,000, excl +150 4,000 to 6,000, excl. +200 ASTM-ASTMA366,A619,A620 1. Classification and Chemical Composition Classification Quality chemical composition % C Si Mn P S A366 Commercial Quality 0.15 Max. - 0.60 Max. 0.035 Max 0.040 Max A619 Drawing Quality 0.10 Max. - 0.50 Max. 0.025 Max 0.035 Max A620 Deep Drawing Special Killed 0.10 Max. - 0.50 Max. 0.025 Max 0.035 Max 2. Permissible Variations in Dimensions & Shapes, ASTM a568.83 1. Thickness Tolerances (Only for Reference) Specified width, in. (mm) Thickness Tolerances Over, in. No Tolerance Under Specified Minimum Thickness, in. Over 0.098(2.49) to 0.142 (3.61) inch Over 0.071(1.80) to 0.098(2.49) inch Over 0.057 (1.45) to 0.071(1.80) inch Over 0.039 (0.99) to 0.057(1.45) inch Over 0.019 (0.48) to 0.057(0.99) inch 0.014 (0.36) to 0.019(0.48) inch Over 12(305) to 15(381), inch 0.010 (0.25) 0.010 (0.25) 0.010 (0.25) 0.008(0.20) 0.006(0.15) 0.004(0.10) Over 15(381) to 72(1,829), inch 0..012(0.30) 0.010 (0.25) 0.010 (0.25) 0.008(0.20) 0.006(0.15) 0.004(0.10) Over 72 (1,829) 0.014(0.36) 0..012(0.30) 0.010 (0.25) 0.008(0.20) 0.006(0.15) - Notes Thickness is measured at any point across the width not less than 3/8 in. (9.5mm) from a side edge. The specified thickness range captions noted below also apply when sheet is specified to a nominal thickness, and the above tolerances are divided equally over and under 2. Width Tolerances (Coils and / Cut Lengths, Over 12 in. (305 mm) in width, Not Resquared) Specified Width, in. (mm) Tolerances Over Specified Width, No Tolerance Under in mm Over 12( 305) to 30 (762), inch. 1/8 3.2 Over 30 (762) to 48 (1,219), inch. 3/16 4.8 Over 48 (1,219) to 60 (1,524), inch. 1/4 6.4 Over 60 (1,524) to 80 (2,032), inch. 5/16 7.9 Over 80 (2,032) 3/8 9.5 3. Length Tolerances, (Cut Lengths Over 12 in. 305mm) in width, Not Resquared) Specified Width, in. (mm) Tolerances Over Specified Width, No Tolerance Under in mm Over 12( 305) to 30 (762), inch. 1/8 3.2 Over 30 (762) to 60(1,524), inch. 1/4 6.4 Over 60(1,524) to 96 (2,438), inch. 1/2 12.7 Over 96(2,438) to 120 (3,048), inch. 3/4 19.1 Over 120(3,048) to 156 (3,962), inch 1 25.4 Over 156 (3,962) to 192 (4,877), inch. 1 1/4 31.8 Over 192 (4,877) to 240 (6,096), inch. 1 1/2 38.1 Over 240 (6,096) 1 3/4 44.5