Honda Motor Co., Ltd.

Brokmeier, Klaus

Frommeyer, Georg

Sven Leonhardt

Georg Frommeyer

Yoshitaka Okitsu

Masashi Ishii

Klaus Brokmeier

A high-strength steel sheet comprises, by weight, not less than 0.25% and not more than 0.5% of C, not less than 4% and not more than 14% of Mn, not less than 6.5% and not more than 9.5% of Cr, and not less than 0.3% and not more than 3% of Si. The high-strength steel sheet satisfies formulas 1 and 2, formula (1) being 12&#x2266;2.0Si+5.5Al+Cr+1.5Mo&#x2266;25 and formula (2) being 13&#x2266;30C+0.5Mn+0.3Cu+Ni+25N&#x2266;17, and mainly consists of austenite, and the high-strength steel sheet has yield strength of not less than 1000 MPa and total elongation of not less than 20%. In formulas 1 and 2, each element in the above formulas indicates the content, in weight %, of the element.

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Offenbach/Am Main, Germany

Sven Leonhardt