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ANSWER: JIS G 3141 is the Japanese industrial standard specifies the cold-reduced carbon steel sheets, coils and strip, including the cold rolled strip steel and also the cut lengths there from.
JIS G 3141 SPCG is cold rolled Non-ageing extra deep drawing quality steel material coil, strip or sheets.
The surface finish of SPCG grade steel has full finished(use D), and Bright finish (use B)
SPCG is Non-ageing extra deep drawing quality steel. The first “C” means cold rolled , “G” means Non-ageing extra deep drawing.
The exact mechanical property requirements of SPCG is :Yield strength is max 190MPa, tensile strength is min 270MPa, total Elongation in 80mm is min 42% .
