AISI4340 is a nickel-chromium-molybdenum  alloy  steel known for its toughness and its ability  to attain  high  strengths in the heat-treated condition. It has very good fatigue resistance ,also ,it maintaining wear resistance.  Let's  talk about  the application  about  the  4340, it's  mainly applying in Commercial and military aircraft, automotive systems, forged hydraulic and other machine tool applications, forged steel crankshafts.  

 Otai Steel supplies a wide range of carbon, alloy and stainless steel products, including high speed tool steel, cold works tool steel, hot works tools steel, plastic mould steel, engineering steel and machine structural steel etc. After almost 20 years development and growing, Otai Steel becomes one comprehensive special steel factory, stockist and exporter. Combined with experienced exporting team and professional technical knowledge, Otai Steel offers both technical advice and support, as well as global professional steel solution and service. Due to satisfactory reliable quality and professional service, Otai expands our market worldwide, such as UAE, Canada, Brazil, Colombia, Chile, Spain, Turkey, Algeria, Vietnam, Malaysia and so on.