1. 20MnSi steel sheet is an alloy structural steel plate. Due to its high strength and better comprehensive performance, it is widely used in the production of steel structure, construction, machine parts and various standard parts.
2. Chemical composition of 20MnSi alloy steel sheet:
| C | Mn | Ni | Si | P | S | Cr | Cu |
| 0.17-0.23 | 1.30-1.70 | ≤0.030 | 0.40-0.70 | ≤0.045 | ≤0.045 | ≤0.030 | ≤0.030 |
3. The influence of chemical composition on 20MnSi alloy steel sheet:
1) Reducing the control points of carbon and manganese elements has a good effect on the comprehensive mechanical and technological properties of 20MnSi steel.
2) Reducing the content of sulfur and phosphorus is particularly beneficial to the weldability of 20MnSi steel.
3) In order to obtain 20MnSi alloy steel sheet with uniform and stable chemical composition, high strength, good plasticity, and good cold-formed and weldable properties, steelmaking must be produced in strict accordance with internal control standards.
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