Patent ID: 8758893

Claim:
Enamelware comprised of a steel substrate on the surface of which an enamel layer is provided, wherein said steel substrate contains, by mass %, Cu: 0.05 to 0.37%, Si: 0.1 to 2.0%, Mn: 1.2 to 2.0%, Mo: 0.003 to 0.034 P: 0.005 to 0.10%, S: 0.005 to 0.1%, C: 0.20% or less, Sb: 0.080 to 0.8%, Ni: 0.005 to 4.5%, and Co: 0.008 to 4.0%; optionally one or more elements selected from the group consisting of: Sn: 0.005 to 0.3%, Cr: 0.005 to 2.0% Ti: 0.01 to 2.0%, Nb: 0.01 to 2.0%, V: 0.01 to 2.0%, Zr: 0.01 to 2.0%, B: 0.001 to 1.0% Ca: 0.005 to 2.0%, Rem: 0.005 to 2.0%, Mg: 0.005 to 1.0%, O: 0.01 to 0.30%, Al: 0.005 to 0.10% and a balance of Fe and unavoidable impurities, wherein said enamel layer has a thickness of 50 to 700 μm, and contains at least one element selected from the group consisting of, in total content per total mass, Ni: 0.005 to 4.5% and Co: 0.008 to 4.0%.