Quality Assurance Astm 5140 Chemical Composition - China

5140 steel is a medium carbon alloy steel, and its main ASTM 5140 chemical composition is as follows:

- **Carbon (C)**: 0.38%-0.43%.

Carbon is one of the main elements that determine the strength and hardness of steel.

A moderate content can make the steel have a better combination of strength and toughness.

- **Silicon (Si)**: 0.15%-0.35%.

Silicon can enhance the strength and hardness of steel and improve the oxidation resistance and corrosion resistance of steel.

- **Manganese (Mn)**: 0.70%-0.90%.

Manganese can improve the strength and toughness of steel and improve the hot working performance of steel.

- **Chromium (Cr)**: 0.70%-0.90%.

Chromium can improve the hardenability, hardness, wear resistance and corrosion resistance of steel.

In addition, the ASTM 5140 chemical composition may also contain some trace amounts of other elements, such as nickel (Ni), molybdenum (Mo), etc.

The content of these elements is usually low, generally below 0.1%, and their presence will also have a certain impact on the performance of the steel.

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