Ferritisk rustfrit stål med 19 % chrom stabiliseret med niobium

摘要

The stainless steel contains the following elements in wt/%: carbon up to 0.03; manganese up to 1; silicon 0.3 - 1; sulfur up to 0.01; phosphorous up to 0.04; chrome 18 - 22; nickel 0.5; molybdenum up to 2.5; copper up to 0.5; titanium up to 0.02; zirconium up to 0.02; aluminum up to 0.02; niobium 0.2 - 1; vanadium up to 0.2; nitrogen up to 0.03; cobalt 0,005 - 0.05; tin up to 0.05; the rest being made up of iron and unavoidable impurities. The steel is poured as a semi-finished product, heated to over 1000 degrees C, hot and cold rolled and reheated to a temperature and for a duration that produce a completely recrystallised structure having a ferritic grain size of between 10 and 60 micrometres.