welding part 1)the material is carbon steel,thickness-2.0mm 2)the material is S420 3)all kinds of surface treatments are available:polishing,Zinc plated,Nickel plated,Chrome plated, powder coating,Phosphate coating,E-coating.the surface treatment is KTL(Ecoating) 4)It's supplied to German VW company 5)very high production rate assure low production cost 6)we are good at supplying metal stamping part which integrates stamping,deep drawing,cutting, welding. 7)ISO-TS16949 is certified.