Ferritic-austenitic chromium-nickel and method of making a...

Details Ferritic-austenitic chromium-nickel and method of making a... Ferritic-austenitic chromium-nickel and method of making a...

C - Chemistry, Metallurgy

22

C

75/140

C22C 38/58 (2006.01) C21D 7/00 (2006.01)

Patent

CA 1127881

ABSTRACT OF THE DISCLOSURE Steel bodies composed of ferritic-austenitic Cr-Ni steel with 30 to 70% austenite and consisting essentially of: up to 0.1% by weight carbon, up to 1.0% by weight silicon, 4.0% to 6.0% by weight manganese, 22.0% to 28.0% by weight chromium, 3.5% to 5.5% by weight nickel, 1.0% to 3.0% by weight molybdenum, 0.35% to 0.6% by weight nitrogen, balance iron and unavoidable impurities, are subjected to forging and after even second degree deforming, possess a notch impact strength (tenacity) according to the ISO-V or Charpy test of more than 35 Joule and a mean yield point of 600 N/mm2.

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