... production diameter: 0.15mm-7.0mm2.iron wire and copper wire production diameter: 0.5mm-10.0mmMaterial of ... corrosion resistant and heat resistant steel wire), bronze, copper, phosphorus copper, beryllium copper. Alloy steel contains 60Si2MNA, 60Si2CRVA, 55CrSi.Product performance1 ... 5.battery spring is easy to solder tin.Phosphor copper spring is excellent for electric conduction.Application All ...