China Alloy Steel Tube factory AISI SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like聽axles, shafts, bolts, gears and other applications. Similar to alloy grade AISI 4130 chrome moly alloy steel but with a slightly higher carbon content. The higher carbon content of AISI 4140 steel gives greater strength and heat treatment capabilities in comparison to AISI / ASTM 4130 alloy steels, however it does have inferior weld ability聽characteristics. 聽 Equivalent CountryJapanGermanyBritainUSAChinaAustralia StandardJIS G4105DIN 17200BS970ASTM A29GB/T 3077AS 1444 GradeSCM44042CrMo4/1.7225EN19/709M40414042CrMo4140 聽 Chemical Composition GradeCSiMnPSCrMoNi 41400.38-0.430.15-0.350.75-1.00.0350.040.8-1.10.15-0.25 42CrMo40.38-0.450.40.6-0.90.0350.0350.9-1.20.15-0.3 EN190.35-0.450.1-0.350.5-0.80.050.050.9-1.50.2-0.4 SCM4400.38-0.430.15-0.350.6-0.850.030.030.9-1.20.15-0.3 聽 Mechanical Properties聽聽 The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman. 聽 Detailed Images Seamless steel pipes are perforated from a whole round steel, and steel pipes without welds on the surface are called seamless steel pipes. According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and top pipes. According to the cross-sectional shape, seamless steel pipes are divided into two types: round and special-shaped. Special-shaped pipes have square, oval, triangular, hexagonal, melon seed, star, and finned pipes. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes. Seamless steel pipes are mainly used as petroleum geological drilling pipes, petrochemical cracking pipes, boiler pipes, bearing pipes, and high-precision structural steel pipes for automobiles, tractors, and aviation. 聽 Aplication Packing Delivery The steel pipe will be packed in seaworthy packing such as steel strips bundles. If you have any special requests on this, please let us know advanced. We will refer to your email kindly. 1).20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 2).40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 3).40ft HC:12032mm(Lengh)x2352mm(Width)x2698mm(High) 聽China Alloy Steel Tube factory website:http://www.htspecialmetals.com/alloy-steel/alloy-steel-tube/