Patent ID: 9279172
Filing Date: 2016-03-08
CPC Classification: C21D,C22C,F01N

Claim Text:
1. A ferritic stainless steel, comprising: C: 0.015 mass % or less, Si: 1.0 mass % or less, Mn: 1.0 mass % or less, P: 0.04 mass % or less, S: 0.010 mass % or less, Cr: 16 to 23 mass %, N: 0.015 mass % or less, Nb: 0.3 to 0.65 mass %, Ti: 0.002 to 0.15 mass %, Mo: 0.1 mass % or less, W: present in an amount up to and including 0.1 mass %, Cu: 1.0 to 2.5 mass %, Al: 0.2 to 1.5 mass %, Ni: 0.05 to 0.5%, V: present in an amount up to 0.5%, and a balance of Fe and inevitable impurities, and having an oxidation weight gain of 27 g/m 2 or less when held for 300 hours in atmospheric air heated to 950° C. in a furnace.