Product Overview The stainless steel sink bowl seam welding machine is engineered for SS304 and SS316 stainless steel, the two grades most commonly used in kitchen sink manufacturing. It produces food grade, airtight welds with a smooth surface finish, satisfying the hygiene and durability requirements of modern sink buyers. Key Features SS304 and SS316 Compatibility: Welding parameters are optimized for both austenitic stainless steel grades used in kitchen sinks. Food Grade