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High-strength galvanized steel sheet with excellent bendability and stretch flangeability and its manufacturing method
High-strength galvanized steel sheet with excellent bendability and stretch flangeability and its manufacturing method
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机译：高强度镀锌钢板具有出色的弯曲性和伸展法不义和制造方法
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摘要
The present invention relates to high tensile strength steel having a tensile strength of 780 MPa grade or higher which is used for structural members of automobiles, and more specifically relates to high tensile strength steel having excellent bendability and stretch-flangeability while still satisfying characteristics of DP steels of low yield ratio and high ductility, and to a manufacturing method thereof.
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