摘要:
Provided is a ferritic stainless steel having a chemical composition containing, in mass%: 0.003% to 0.025% of C; 0.05% to 1.00% of Si; 0.05% to 1.00% of Mn; 0.04% or less of P; 0.01% or less of S; 16.0% to 23.0% of Cr; 0.20% to 0.80% of Cu; 0.05% to 0.60% of Ni; 0.20% to 0.70% of Nb; 0.005% to 0.020% of N; and the balance being Fe and incidental impurities, in which a nitrogen-enriched layer is present that has a nitrogen concentration peak value of 0.03 mass% to 0.30 mass% at a depth of within 0.05 µm of a surface of the steel.
摘要:
Provided is a ferritic stainless steel that has excellent corrosion resistance and displays good brazing properties when brazing is carried out at high temperature using a Ni-containing brazing metal. These effects are obtained as a result of the steel having a chemical composition containing, in mass%: 0.003% to 0.020% of C; 0.05% to 1.00% of Si; 0.10% to 0.50% of Mn, 0.05% or less of P; 0.01% or less of S; 16.0% to 25.0% of Cr; 0.05% to 0.35% of Ti; 0.005% to 0.05% of Al; and 0.005% to 0.025% of N, the balance being Fe and incidental impurities, and as a result of a nitrogen-enriched layer being created that has a nitrogen concentration peak value of 0.05 mass% to 0.30 mass% at a depth of within 0.05 µm of a surface of the steel.
摘要:
A metal material for an inter-connector of a solid oxide type fuel cell which has a chemical composition, in mass %: C: 0.20 % or less, Si: 0.02 to 1.0 %, Mn: 2.0 % or less, Cr: 10 to 40 %, Mo: 0.03 to 5.0 %, Nb: 0.1 to 3.0 %, provided that 0.1 ≤ Mo/Nb ≤ 30, one or more selected from among Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Zr and Hf: 1.0 % in total, and the balance: Fe and inevitable impurities. The metal material is excellent in the resistance to oxidation, is improved in the resistance to exfoliation of an oxidized film due to the reduced growing rate of the oxidized film, has good electroconductivity, exhibits a reduced difference in thermal expansion between it and a suitable electrolyte, and can be produced at a low cost.
摘要:
Provided is a ferritic stainless steel that has excellent corrosion resistance and displays good brazing properties when brazing is carried out at high temperature using a Ni-containing brazing metal. These effects are obtained as a result of the steel having a chemical composition containing, in mass%: 0.003%-0.020% of C; 0.05%-1.00% of Si; 0.10%-0.50% of Mn, 0.04% or less of P; 0.01% or less of S; 16.0%-25.0% of Cr; 0.05%-0.60% of Ni; 0.25%-0.45% of Nb; 0.005%-0.15% of Al; 0.005%-0.030% of N; and at least one selected from 0.50%-2.50% of Mo and 0.05%-0.80% of Cu, the balance being Fe and incidental impurities, and as a result of a nitrogen-enriched layer being created that has a nitrogen concentration peak value of 0.03 to 0.30 mass% at a depth of within 0.05 µm of a surface of the steel.
摘要:
A Fe-Cr-Al based alloy foil having a thickness of 40 mu m or less, which has a chemical composition in mass %, wherein the contents of Cr and Al are 16.0 to 25.0 % and 1 to 8 %, respectively, it contains La and Zr in contents depending on the thickness of the foil so as to satisfy the following formula: 1.4/t