Ductile ferritic steels

Details Ductile ferritic steels Ductile ferritic steels

C - Chemistry, Metallurgy

22

C

75/122

C22C 38/22 (2006.01) C22C 38/48 (2006.01) C22C 38/50 (2006.01)

Patent

CA 1084734

ABSTRACT OF THE DISCLOSURE Ferritic, stabilised, stainless and corrosion-resistant chromium-molybdenum steels with a carbon content of from 0.01 to 0.025%, a nitrogen content of from 0.005 to 0.025%, a chromium content of from 20.0 to 30.0%, a molybdenum content of from 3.0 to 5.0%, manganese and silicon contents of from 0.02 to 1.0% in each case and vanadium, tungsten, cobalt and aluminum contents of at most 0.25% in each case and also with a nickel content of from 3.2 to 4.8%, a copper content of from 0.1 to 1.0%, a titanium content of from 0.2 to 0.7% and/or a niobium content of from 0.2 to 1.0%, the rest being iron with the usual impurities, alloying additions of boron and/or zirconium being permitted in quantities which correspond to the prior art. Such stabilised, ferritic, chromium-molybdenum steels have low transition temperatures reducing the likelihood of their becoming brittle upon welding.

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