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:
Jul. 13, 2010
Filed:
Nov. 13, 2003
Jean Beguinot, Le Creusot, FR;
Jean-georges Brisson, Le Creusot, FR;
Jean Beguinot, Le Creusot, FR;
Jean-Georges Brisson, Le Creusot, FR;
Industeel Creusot, Puteaux, FR;
Abstract
The invention concerns weldable steel building components whereof the chemical composition comprises, by weight: 0.10%≦C≦0.22%, 0.50%≦Si≦1.50%, AI≦0.9%, 0%≦Mn≦3%, 0%≦Ni≦5%, 0%≦Cr≦4%, 0%≦Cu≦1%, 0%≦Mo+W/2≦1.5%, 0.0005%≦B<0.010%, N≦0.025%, optionally at least one element selected among V, Nb, Ta, S et Ca, in contents less than 0.3%, and/or among Ti and Zr in contents not more than 0.5%, the rest being iron and impurities resulting from preparation, the aluminium, boron, titanium and nitrogen contents, expressed in thousandths of %, of said composition further satisfying the following relationship: B≦⅓×K+0.5, (1) with K=Min (I*; J*), I*=Max (0; I) and J*=Max (0; J), I=Min (N; N−0.29(Ti−5)), J=Min {N; 0.5 (N 0.52 AI+√j(N 0.52 AI)+283)}, the silicon and aluminium contents of the composition additionally verifying the following conditions: if C>0.145, then Si+AI<0.95 and whereof the structure is bainitic, martensitic or martensitic/bainitic and further comprises 3 to 20% of residual austenite.