A welded joint formed between stainless steel and a copper-base alloy is a combination of materials with high corrosion resistance and high mechanical strength and materials with high thermal conductivity. Such a combination is suitable for applications in heat exchangers and piping design among others. Forming a welded joint between stainless steel and a copper-base alloy is difficult because the physical properties of the two metals-such as thermal conductivity and melting point-are different, and they do not form an alloy. In this study, we propose a method for butt welding brass and stainless steel using a disk YAG laser by selecting appropriate bonding conditions, and evaluate the characteristics of the joint. The results indicate that a good weld can be obtained by shifting the laser irradiation position to the brass side.

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