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ANSWER: JIS G 3135 SPFC440 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.
SPFC440 also called SPFC35 whose applied thickness is 0.6 and over to 2.3 mm . SPFC440 is a forming use quality use steel material The carbon composition of all the above grades is max 0.12%. The yield strength of SPFC440 is min 265MPa, tensile strength is min 440MPa, Elongation is min 26%
