battery contact springs 1.Wire Dia.0. ... 3.Standard:ISO9001 ROHS SGS 4.Customizable battery contact springs1>9 years of experience in producing ... , mild steel wire, manganese steel wire, phosphorus copper wire, nickel-plated wire, zinc-plated wire, tin ... resistant and heat resistant steel wire), bronze, copper, phosphorus copper, beryllium copper. Alloy steel has 60Si2MNA, 60Si2CRVA, 55CrSiSurface ...