Explanation

steel used for manufacturing various engineering structural parts (such as structural parts of buildings, bridges, ships, vehicles, etc.) and various mechanical parts is required to have high rigidity, high strength and good toughness and plasticity. According to whether alloy elements other than carbon are added, they can be divided into non alloy structural steel, low alloy high-strength steel and alloy structural steel. According to the main use, it can be divided into engineering structural steel and mechanical structural steel.

Classification