C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
C21D 8/04 (2006.01) B32B 15/01 (2006.01) C22C 38/00 (2006.01) C22C 38/04 (2006.01) C22C 38/06 (2006.01)
Patent
CA 2435938
The invention concerns a steel whereof the composition, expressed in wt. %, comprises: 0.03 <= C <= 0.06; 0.50 <= Mn <= 1.10; 0.08 <= Si <= 0.20; 0.015 <= Al <= 0.070; N <= 0.007; Ni <= 0.040; Cu <= 0.040; P <= 0.035; S <= 0.015; Mo <= 0.008; Ti <= 0.005; providing that it also comprises boron in an amount such that: 0.65 <= B/N <= 1.60, the rest of the composition consisting of iron and impurities resulting from preparation. The invention also concerns a method for making steel plates having said composition and the resulting plates.
La présente invention concerne un acier dont la composition comprend, exprimés en % en poids: 0,03 <= C <= 0,06; 0,50 <= Mn <= 1,10; 0,08 <= Si <= 0,20; 0,015 <= Al <= 0,070; N <= 0,007; Ni <= 0,040; Cu <= 0,040; P <= 0,035; S <= 0,015; Mo <= 0,008; Ti <= 0,005 étant entendu qu'elle comprend également du bore en une quantité telle que: 0,65 <= B/N <= 1,60 le reste de la composition étant constitué de fer et d'impuretés résultant de l'élaboration, un procédé de fabrication de tôles ayant cette composition et les tôles ainsi obtenues.
Marsal Joel
Mescolini Dominique
Robic
Usinor
LandOfFree
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