Ferritic-austenitic duplex stainless steel

Details Ferritic-austenitic duplex stainless steel Ferritic-austenitic duplex stainless steel

C - Chemistry, Metallurgy

22

C

75/100

C22C 38/42 (2006.01) C22C 38/00 (2006.01) C22C 38/44 (2006.01) C22C 38/52 (2006.01)

Patent

CA 1242095

ABSTRACT OF THE DISCLOSURE Ferritic-austenitic duplex stainless steel comprising the following components in the following proportions in % by weight: 0 < C ? 0.08, Si 0.2 - 2.0, Mn 0.2 - 2.0, Cr 19.0 - 30.0, Ni 3.0 - 9.0, Mo 1.0 - 5.0, Cu 0.5 - 3.0, Co 0.2 - 4.0, N 0.05 - 0.35, the balance being substantially .epsilon.e and inevitable impurities, the proportions of Cr and Ni having the correlation of 19.0 ? Cr < 24.0 and 3.0 ? Ni ? 8.0, or 24.0 ? Cr ? 30.0 and 4.0 ? Ni ? 9.0 the micro structure of the steel containing delta-ferrite phase in an amount of 30 to 70% in area ratio. -33-

473261

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