Austenitic stainless steel with improved resistance to...

Details Austenitic stainless steel with improved resistance to... Austenitic stainless steel with improved resistance to...

C - Chemistry, Metallurgy

22

C

75/97

C22C 38/48 (2006.01) C22C 38/40 (2006.01) C22C 38/50 (2006.01)

Patent

CA 1236712

AUSTENITIC STAINLESS STEEL WITH IMPROVED RESISTANCE TO CORROSION BY NITRIC ACID Abstract of the Disclosure An austenitic stainless steel exhibiting improved resistance to corrosion caused by nitric acid is disclosed, which consists essentially of: C : not more than 0.03% by weight, Si: 2 - 6% by weight, Mn: 0.1 - 8% by weight, Cr: 20 - 35% by weight, Ni: 17 - 50% by weight, Mg: not more than 0.02%, at least one of Nb, Ti and Ta in the total amount of 8xC(%) or more, but 1.0% by weight or less, S : not more than 0.003% by weight, Oxygen : not more than 0.003% by weight, N : not more than 0.03% by weight, P : not more than 0.02% by weight, Fe and incidental impurities: balance the composition further satisfying the following relationships; -10 ? Ni(Bal) ? -0.1 Cr(%) ? (7/4)Si(%) + 16.5 Mg(%) - 0.75xS(%) - 1.5xOxygen(%) ? 0 wherein, Ni(Bal) = 30xC(%) + 0.5xMn(%) + Ni(%) + 8.2 - 1.1x[1.5xSi(%) + Cr(%)].

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