STEEL MATERIAL SUPERIOR IN CORROSION RESISTANCE

PROBLEM TO BE SOLVED: To provide a steel material having superior corrosion resistance without causing decrease in mechanical characteristics and weldability due to an excessive addition of elements for improving the corrosion resistance. SOLUTION: (1) The steel material superior in corrosion resistance includes Zn and further one or more elements among 6.0 mass% or less Cr, 0.05-3.0 mass% Cu and 0.05-6.0 mass% Ni. (2) The steel material superior in corrosion resistance includes 0.0001-30 mass% Zn and further one or more elements among 0.2 mass% or less Cr, 0.05-3.0 mass% Cu and 0.05-6.0 mass% Ni.(3) The steel material includes further 0.01-1.0 mass% Ti in the above steel material. (4) The steel material includes further 0.20 mass% or less C, 0.10-1.0 mass% Si, 2.5 mass% or less Mn and 0.05-0.50 mass% Al in the above steel material. COPYRIGHT: (C)2005,JPO&NCIPI