C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 38/44 (2006.01) C22C 30/02 (2006.01) C22C 38/04 (2006.01) C22C 38/42 (2006.01) C22C 38/58 (2006.01)
Patent
CA 2342817
A duplex stainless steel alloy has been developed, which contains in weight-%: C maximum 0.05, Si maximum 0.8, Mn 0.3-4, Cr 27-35, Ni 3-10, Mo 0-3, N 0.30-0.55, Cu 0.5-3.0, W 2.0-5.0, S maximum 0.010 balance Fe and normally occurring impurities and additions. The content of Fe is 30-70 volume-%. The steel alloy well suited in those chloride environments, where demands are made on god resistance to crevice corrosion. A relatively high content of W has at the same time given a god effect on both the pitting- and crevice corrosion properties.
L'invention concerne un acier inoxydable duplex qui contient en % poids : C 0,05 maximum Si 0,8 maximum Mn 0,3-4 Cr 27-35 Ni 3-10 Mo 0-3 N 0,30-0,55 Cu 0,5-3,0 W 2,0-5,0 S 0,010 maximum, le solde étant du Fe et des impuretés et additions habituelles. Le contenu de Fe représente 30-70 pourcent du volume. L'alliage d'acier est adapté aux environnements chlorurés, dans lesquels une bonne résistance à la corrosion caverneuse est exigée. Une teneur relativement élevée en W exerce un effet bénéfique sur la corrosion caverneuse et la corrosion par piqûres.
Gowling Lafleur Henderson Llp
Sandvik Ab
Sandvik Intellectual Property Ab
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