| 摘要 |
PURPOSE: To develop a stainless steel welding material excellent in selective corrosion resistance and cold workability in a high temp.-high concn. sulfuric acid soln. by regulating the components in a high Si-contg. Ni-Cr stainless steel to specified ranges. CONSTITUTION: The components are regulated in such a manner that, by weight, <0.08% C, 4.5 to 7.0% Si, <2.0% Mn, 8 to 30% Ni, 10 to 20% Cr, and the balance Fe are constituted, and the expression I is satisfied. Or, the components are regulated in such a manner that, furthermore, one or >=two kinds among 0.5 to 3.0% Cu, 0.2 to 2.0% Mo and 0.005 to 1.0% Pd are contained, and the value ofδc denoting aδferrite forming tendency expressed by the formula II satisfies the range of -7<=δc<17. The stainless steel welding material in which the weld zone has excellent selective corrosion resistance and cold workability even in high temp.-high concn. sulfuric acid in which the concn. is regulated to >=95% and the temp. to >=65 deg.C can be obtd.
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