Applications
- In all types of parts subject to severe stresses such as automotive transmission shafts, axles, dies, gears, drilling parts, hot cutting shears, etc.
- Automotive, marine, diesel engine crankshafts and other heavy-duty shafts, half-shafts, substitutes, gears, mining drilling parts, tools for oil wells, drilling bodies, master plates, etc.
Characteristics:
- This 4340-QT steel is one of the best machinery grade alloy steels due to its high alloy content, excellent and deep hardenability, good toughness and ductility, and its high tensile strength allows its use in parts subject to severe stresses.
- Although it is difficult to weld, if parts are preheated, any welding method can be used.
- Machinability: 57% taking 1212 Steel as 100%.