Alloy steel has high strength

The alloy steel is mainly obtained by adding silicon, manganese, chromium, nickel, tungsten, vanadium and other alloying elements into the steel by the use of appropriate processes, so as to improve the strength, toughness and wear resistance of metal materials. Our high-strength alloy steel fasteners are classified as 10.9, 12.9, 14.9, etc., which are mainly used in steam turbines, engines, pump valves, mining machinery, shield tunneling machines and other fields. These alloy steel materials are mainly as follows: