The performance indicators of steel structure materials include strength, plasticity, cold bending performance, impact toughness, welding performance, and durability.

1. Strength

The strength indicators of steel include elastic limit σe, yield limit σy, and tensile limit σu. Tensile strength σu is the maximum stress that steel can withstand before failure. The value of ‘σu/σy can be regarded as a parameter of steel strength reserve.

2. Plasticity

The plasticity of steel generally refers to the property of having significant plastic deformation without breaking after the stress exceeds the yield point. The main indicators for measuring the plastic deformation capacity of steel are elongation δ and cross-sectional shrinkage ψ.

3. Cold bending performance

The cold bending performance of steel is to measure the resistance of steel to cracks when plastic deformation is generated by bending processing at room temperature. The cold bending performance of steel is to use cold bending experiments to test the bending deformation performance of steel under a specified bending degree.

4. Impact toughness

The impact toughness of steel refers to the ability of steel to absorb mechanical kinetic energy during the fracture process under impact load. It is a mechanical property that measures the steel's resistance to impact load and may cause brittle fracture due to low temperature and stress concentration.

5. Welding performance

The welding performance of steel refers to the ability to obtain a good welding joint under certain welding process conditions. Welding performance can be divided into welding performance during welding and welding performance in terms of use.

6. Durability

Durability is the ability of a material to resist the long-term destructive effects of both itself and the natural environment.

The performance indicators of steel structure materials include strength, plasticity, cold bending performance, impact toughness, welding performance, and durability.

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