The Use and Properties of Low Alloy Steel

The components of low alloy steel welded structures usually need to go through processes such as processing and forming, welding, and post weld heat treatment, which requires the steel to have good process performance. The process performance includes the weldability, cutting performance, cold and hot working performance, heat treatment performance, malleability, uniform stability of the structure, and hardenability of large cross-sections of the metal. While considering material costs, the impact of different levels of material processing and welding difficulty on manufacturing costs should also be considered.

Low alloy steel has been widely used in the manufacturing of engineering machinery, ships, bridges, high-rise buildings, boilers and pressure vessels, electricity, and various vehicles. This is inseparable from its characteristics, such as plasticity, toughness, and welding performance. The figure set shows the uses and characteristics of some common low alloy steels.