明富钢材优质供应---420 Type 420 Stainless Steel provides both outstanding corrosion resistance and exceptional wear resistance. To obtain the best possible strength and wear resistance, oil quench alloy 420 at a temperature between 1800° F and 1950° F. 明富钢材优质供应---420 Alloy 420 Stainless Steel is commonly used in dental and surgical instruments, cutlery, plastic molds, pump shafts, steel balls, and numerous hand tools. 明富钢材优质供应---420Because of its air hardening properties, type 420 Stainless Steel is not often welded, although, it is possible. 明富钢材优质供应---420When welding with stainless steel type 420, preheat the steel to a temperature between 300° F and 400° F. 明富钢材优质供应---420After welding, temper the work piece at temperature for two hours. When hot working, it is recommended to gradually raise the temperature to 1400° F and then gradually raise the temperature to anywhere from 2000° F to 2200° F. While working, avoid letting the work temperature drop below 1600° F by frequently reheating the steel. 明富钢材优质供应---420To prevent cracking, furnace cool the work piece slowly after working. Any extreme cold forming will cause alloy 420 Stainless Steel to crack, but it can endure minor cold work