High corrosion resistant and high strength medium cr and low...

Details High corrosion resistant and high strength medium cr and low... High corrosion resistant and high strength medium cr and low...

C - Chemistry, Metallurgy

22

C

75/124, 148/48

C22C 38/12 (2006.01) C21D 1/00 (2006.01) C21D 6/00 (2006.01) C22C 38/42 (2006.01) C22C 38/44 (2006.01)

Patent

CA 1097949

Abstract of the Disclosure The specification discloses a high corrosion resistant and high strength medium Cr and low Ni stainless cast steel and a method of preparing the same. The steel material comprises either: (A) C: 0.1% or below, Si: 1.5% or below, Mn: 2.0% or below, P: 0.04% or below, S: 0.04% or below, Cr: 17.0% to 20.0%, Ni: 3.0% to 7.0%, Mo: 1.5% to 2.5%, Cu: 5.0% to 7.0%, N: 0.1% or below and the balance substantially of Fe; or (B) C:0.1% or below, Si: 0.5% or below, Mn: 2.0% or below, P: 0.04% or below, S: 0.04% or below, Cr: 17.0% to 20.0%, Ni: 3.0% to 7.0%, Mo: 1.5% to 2.5%, Cu: 2.5% to 5.0%, W: 0.2% to 2.0%, N: 0.1% or below and the balance substantially of Fe, with said Mo and Cu contents in weight percentage being set to be in range of Mo+Cu: 5.0% to 7.0%; said percentages being by weight. Further improvements in the steel are obtained by heat treatments. The resulting steel is stable and reliable in structure and performance and which is resistant to strong acids.

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