1, the performance characteristics of higher strength, adequate plasticity and toughness,

Good welding performance. Widely used in construction, bridges and so on.

2, the chemical composition of low carbon steel (carbon content <0.2%);

The alloying element is Mn (content is 1.25 to 1.5%).

3, heat treatment characteristics are generally not heat treatment.

4, commonly used steel 16Mn, 15MnTi and so on.