Joining is possible by a wide variety of techniques. Steels are subdivided into types based upon method of manufacture, hardening or characteristic properties. Disadvantages are low strength and toughness. Good surface finish, dimensional tolerance, good machinability , high strength at low cost and availability. Disadvantages are low toughness, directionality in mechanical properties and high impact transition temperature.
Disadvantages are that it is mostly available as plate or sheet.
These are used primarily for structural applications. Wide range of strengths available. High toughness and low impact transition temperature. High temperature strength and wear resistance. Disadvantage is high cost, poor weldability and machinability with increasing alloy content.