The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2016
Filed:
Nov. 05, 2008
Masashi Ishii, Wako, JP;
Sven Leonhardt, Offenbach/am Main, DE;
Yoshitaka Okitsu, Wako, JP;
Klaus Brokmeier, Duisburg, DE;
Georg Frommeyer, Erkrath, DE;
Ursula Frommeyer, Erkrath, DE;
Astrid Frommeyer, Basel, CH;
Masashi Ishii, Wako, JP;
Sven Leonhardt, Offenbach/am Main, DE;
Yoshitaka Okitsu, Wako, JP;
Klaus Brokmeier, Duisburg, DE;
Georg Frommeyer, Erkrath, DE;
HONDA MOTOR CO., LTD, Tokyo, JP;
Abstract
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≦2.0Si+5.5Al+Cr+1.5Mo≦25 and formula (2) being 13≦30C+0.5Mn+0.3Cu+Ni+25N≦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.