Very high mechanical strength steel and method for making a...

C - Chemistry – Metallurgy – 21 – D

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C21D 8/02 (2006.01) C21D 9/52 (2006.01) C22C 38/04 (2006.01) C22C 38/12 (2006.01) C23C 2/02 (2006.01) C23C 2/06 (2006.01)

Patent

CA 2497870

The invention concerns a very high mechanical strength steel, whereof the chemical composition comprises in wt. %: 0.060 % = C = 0.250 %; 0.400 % = Mn = 0.950 %; Si = 0.300 %; Cr = 0.300 %; 0.100 % = Mo = 0.500 %; 0.020 % = AI = 0.100 %; P = 0.100 %; B = 0.010 %; Ti = 0.050 %, the rest being iron and impurities resulting from preparation. The invention also concerns a method for making a sheet of said steel coated with zinc or zinc alloy.

L'invention concerne un acier à très haute résistance mécanique, dont la composition chimique comprend, en % en poids: 0,060% <= C <= 0,250%; 0,400% <= Mn <= 0,950%; Si <= 0,300%; Cr <= 0,300%; 0,100% <= Mo <= 0,500%; 0,020% <= AI <= 0,100%; P <= 0,100%; B <= 0,010%; Ti <= 0,050% le reste étant du fer et des impuretés résultant de l'élaboration, ainsi qu'un procédé de fabrication d'une feuille de cet acier revêtue de zinc ou d'alliage de zinc.

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