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ANSWER: JIS G 3135 SPFC780Y 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.
SPFC780Y applied thickness is 0.8 and over to 2.0mm . SPFC780Y is a low yield ratio type quality use steel material The carbon composition of all the above grades is max 0.12%. The yield strength of SPFC780Y is min 360MPa, tensile strength is min 780MPa, Elongation is min 13%
