STRUCTURE STEEL

4140 alloy structural steel. This steel has good workability and small processing deformation. The fatigue resistance of 4140 alloy structural steel is quite good. It is a medium-sized hardenable steel. 4140 has good strength and good comprehensive mechanical properties after heat treatment. Good manufacturability and high yield. The highest operating temperature is 427 degrees Celsius. 4140 strength, high hardenability, good toughness, small deformation during quenching, high creep strength and enduring strength at high temperatures.

SAE 4140 alloy steel is a chromium molybdenum alloy steel specification widely used in general purpose high tensile steel for components, like 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 weldability characteristics.