Ultrasoft stainless steel

Details Ultrasoft stainless steel Ultrasoft stainless steel

C - Chemistry, Metallurgy

22

C

75/121

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

Patent

CA 1280301

ABSTRACT OF THE DISCLOSURE The invention relates to an ultrasoft ferritic stainless steel having excellent stamping formability and corrosion resistance in use, which consists essen- tially of: about 0.002 to 0.03% by weight of carbon, about 0.01 to 0.30% by weight of silicon, about 0.01 to 1.5% by weight of manganese, about 0.003 to 0.04% by weight of phosphorus, about 0.001 to 0.15% by weight of sulfur, about 0.02 to 1.0% by weight of nickel, about 0.005 to 0.50% by weight of copper, about 0.01 to 0.6- by weight of molybdenum, about 11.5% to 20% by weight of chromium, about 0.005 to 0.03% by weight of nitrogen, about 0.005% to 0.20% by weight of aluminum, and the balance consisting of iron and conventional impurities, said ultrasoft steel having a Vickers hardness equal to about 140 or less; and said stainless steel has optimum properties for making stamped products such as coins, medals, keys and the like, which are produced by precise stamping in a cold press for example.

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