An In-Depth Look at the Composition and Characteristics of 10SPb20 Steel Grade

Specification:

– The 10SPb20 steel grade is a low carbon, high leaded free machining steel.
– It conforms to the European standard EN10087.
– The steel is commonly used in the automotive and manufacturing industries.
– It is known for its excellent machinability and good formability.

Mechanical Properties:

– Tensile Strength: 370-510 MPa
– Yield Strength: 280-320 MPa
– Elongation: 15-18%
– Hardness: 90-120 HB
– Impact Strength: 20-30 J

Chemical Composition:

– Carbon (C): 0.09-0.15%
– Silicon (Si): 0.10-0.40%
– Manganese (Mn): 0.20-0.60%
– Phosphorus (P): max 0.11%
– Sulfur (S): max 0.27%
– Lead (Pb): 0.15-0.35%
– Iron (Fe): remaining balance

Characteristics:

1. Machinability: The high lead content in 10SPb20 steel provides enhanced machinability, making it suitable for high-speed machining operations. It results in improved chip formation and reduced tool wear.

2. Formability: This steel grade exhibits good formability, allowing for the production of complex parts with ease. It can be easily shaped and manipulated into various forms without significant risk of cracking or failure.

3. Improved Surface Finish: 10SPb20 steel produces a smooth surface finish, reducing the need for additional polishing or finishing processes in certain applications.

4. Wear and Tear Resistance: The steel has good wear resistance due to its lead content, which forms lubricating films on the surface during machining operations, reducing friction and minimizing wear on both the tool and the workpiece.

5. Excellent Chip Breaking: The presence of lead in the composition helps in breaking chips into smaller, more manageable pieces. This improves machining efficiency and reduces the risk of chips becoming entangled or causing damage to the workpiece or machinery.

6. Limited Weldability: This steel grade has limited weldability due to the high lead content. Welding may result in the formation of brittle lead-containing phases, leading to reduced mechanical properties and increased vulnerability to cracking.

7. Good Corrosion Resistance: 10SPb20 steel exhibits good resistance to atmospheric corrosion, making it suitable for certain applications without the need for additional coatings or treatments.

Overall, the 10SPb20 steel grade offers excellent machinability, formability, and wear resistance, making it a sought-after material for various applications requiring high-speed machining and precise shaping.
10SPb20 Steel grade
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