What is 27MnCrB5-2 steel
1. Name meaning of 27MnCrB5-2 steel
- 27 means the steel has an average carbon content of 0.27%.
- Mn means manganese, and its content is about 1%. The addition of manganese can improve the strength and toughness of 27MnCrB5-2 steel.
- Cr stands for chromium and its content is about 0.8-1%. The addition of chromium helps to improve the corrosion resistance and heat resistance of 27MnCrB5-2 steel.
- B means boron, its content is 0.0005-0.003%, the addition of boron can improve the hardness and wear resistance of 27MnCrB5-2 steel.
- 5-2 indicates that the steel has been heat-treated and has high strength.
2. The chemical composition and mechanical properties of 27MnCrB5-2 steel
27MnCrB5-2 is mainly composed of the following elements: manganese (Mn), chromium (Cr), boron (B) and carbon (C). Its chemical composition can bring excellent mechanical properties and wear resistance to 27MnCrB5-2 steel.
The chemical composition of alloy steel has been scientifically proportioned to make 27MnCrB5-2 steel have excellent strength and toughness, and is suitable for the manufacture of various mechanical parts and engineering structure applications.
| Grade | C | Si | Mn | P | S | Cr | B |
| 27MnCrB5-2 | 0.24-0.30 | ≤0.40 | 1.10-1.40 | ≤0.025 | ≤0.035 | 0.30-0.60 | 0.0008-0.0050 |
| Grade | Yield Strength | Tensile Strength | Elongation | Shrinkage |
| σs(MPa) | σb(MPa) | % | % | |
| 27MnCrB5-2 | ≥700 | ≥800 | ≥14 | ≥55 |
3. The use of 27MnCrB5-2 steel
27MnCrB5-2 steel has excellent cutting performance, corrosion resistance and wear resistance, and is often used in the manufacture of knives and industrial parts. After proper heat treatment, 27MnCrB5-2 steel can obtain higher strength and hardness while maintaining a certain degree of toughness.
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