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ANSWER: JIS G 3135 SPFC490 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.
SPFC490 also called SPFC35 whose applied thickness is 0.6 and over to 2.3 mm . SPFC490 is a forming use quality use steel material
The carbon composition of all the above grades is max 0.12%. The yield strength of SPFC490 is min 295MPa, tensile strength is min 490MPa, Elongation is min 23%
