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ANSWER: JIS G 3135 SPFC370 steel is cold rolled or cold reduced high strength steel sheet or steel strip with improved formability for automobile use.
JIS G 3135 is Japanese industrial standard specifications the cold rolled high strength steel sheets with improved formability principally used for structure of automobile.
SPFC370 also called SPFC35 whose applied thickness is 0.6 and over to 2.3 mm . SPFC370 is a drawing quality use steel material
The carbon composition of all the above grades is max 0.12%. The yield strength of SPFC370 is min 205MPa, tensile strength is min 370MPa, Elongation is min 32%
