جذابیت زیبایی شناسی پیش ساخته aisi 420
SS420 Grade AISI 420 Stainless Steel Properties, Heat … AISI 420 steel (SS420) is very brittle under just hardened conditions and usually must be tempered to achieve useful toughness. The tempering temperature for 420 grade stainless steel after austenitizing: 205-370 °C (400-700 °F).