WELD JOINT FORMED WITH STAINLESS STEEL-BASED WELD METAL FOR WELDING A ZINC-BASED ALLOY COATED STEEL SHEET

摘要

Disclosed are a weld joint and a stainless steel-based weld metal composition for the weld joint. The composition and weld joint made therefrom are suitable for welding a zinc-based alloy coated steel sheet. The weld is excellent in corrosion resistance and liquid-metal embrittlement crack resistance. This is accomplished by inhibiting liquid-metal embrittlement cracks of the stainless-steel-based weld metal when the zinc-based alloy coating steel sheet is welded using the stainless-steel-based weld metal. The weld joint comprises a welded portion of weld metal made of stainless-steel-based components, the weld metal containing in mass percent (%): C: 0.01-0.1; Si: 0.1-1; Mn: 0.5-2.5; Ni: 5-11; and Cr: 17-25, and the balance being iron and residual impurities, wherein the following expression are met:-0.81xCr equivalent +23.2 <= Ni equivalent <= 0.95xCr equivalent-8.1... (1); Ni equivalent = Ni + 30xC +0.5xMn + 30xN... (2); Cr equivalent = Cr + Mo + 1.5xSi... (3).