... straight welding, girth welding, argon arc welding, brazing.5. Material: stainless steel, Iron (SPCC, SECC, SPTE, tinplate), aluminum alloy, red copper ... , brass, bronze alloy, etc. 6. Surface treatment: professional stainless steel polishing, grinding and sand blasting by own workshop. Coating (e ... . Warmly welcome for your visit and your enquiry. stainless steel water sinks/kitchen basins