Detailed Analysis The Chemical Composition Of Jis Scr440 Alloy Material - China

jis scr440 alloy material is a medium carbon alloy structural steel widely used in machinery manufacturing, automotive parts and molds.

its excellent strength, toughness and wear resistance mainly come from a reasonable chemical composition ratio.

the following is a detailed analysis of its chemical composition: the role and influence of each element

1 - **carbon (c): **

- content: 0.38% - 0.43%

- **function: **

- improve the hardness and strength of the material.

- increase hardenability, so that the material has higher strength after heat treatment.

- the moderate carbon content keeps it in good toughness and plasticity, suitable for manufacturing high-strength parts.

2 - **silicon (si): **

- content: 0.15% - 0.35%

- **function: **

- increase the strength and hardness of the steel, but will not significantly reduce the toughness.

- improve hardenability and tempering stability.

- act as a deoxidizer during the smelting process to improve the purity of the steel.

3 - **chromium (cr): **

- content: 0.90% - 1.20%

- **function: **

- improve hardenability, so that the material has higher hardness and strength after heat treatment.

- increase wear resistance and corrosion resistance.

- improve high temperature performance, so that the material maintains high strength and hardness at high temperatures.

4 - **nickel (ni) and copper (cu): **

- content: **ni ≤ 0.25%**, **cu ≤ 0.30%** (usually impurities)

- **function: **

- nickel (ni) helps to improve toughness and corrosion resistance, but the content is low and has little effect on performance.

- copper (cu) increases atmospheric corrosion resistance, but has a certain effect on processing performance.

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