A Closer Look at the Composition and Characteristics of 10SPb20 Steel Grade

10SPb20 is a low carbon, leaded steel grade that is primarily used in the manufacturing of components that require good machinability. It is also known as 1.0722 or 15S10PB in different countries.

Chemical Composition:
– Carbon (C): 0.07 – 0.14%
– Silicon (Si): 0.1 – 0.35%
– Manganese (Mn): 0.60 – 1.00%
– Phosphorus (P): maximum 0.035%
– Sulfur (S): maximum 0.35%
– Lead (Pb): 0.15 – 0.35%
Note: The lead content contributes to its machinability but reduces its weldability and ductility.

Characteristics:
1. Machinability: Due to the presence of lead, 10SPb20 exhibits excellent machinability. This grade generates shorter chips during cutting operations and provides improved tool life and surface finish. It is often used in the production of complex and precision components.
2. Ductility: 10SPb20 has relatively low ductility compared to other steel grades. The presence of lead reduces the ability to elongate under tensile stress, making it unsuitable for applications requiring high ductility.
3. Weldability: Welding 10SPb20 is challenging due to the presence of lead. The lead vaporizes during welding, which can lead to toxic fumes. Additionally, the lead can cause porosity and reduced weld strength. Welding this grade requires careful consideration and appropriate precautions.
4. Strength: 10SPb20 has moderate strength, suitable for applications that do not require high load-bearing capabilities.
5. Wear Resistance: This steel grade offers good wear resistance due to the presence of lead. It allows for better lubrication and reduces friction during operation.
6. Surface Finish: Components made from 10SPb20 typically exhibit a smooth and polished surface finish due to its good machinability.

Overall, 10SPb20 is highly valued for its machinability and is commonly used in the automotive, manufacturing, and engineering industries. Its composition provides good machinability but limits its ductility and weldability.
10SPb20 Steel grade
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