24 July 2021 Free-Cutting Steel Bar
45S20 Free Cutting Steel Bar
45S20 is an international standard free cutting steel grades, sulfur-based free cutting steel, widely used in the production of drill chuck, shaft, rod and other products. The China GB standard should be GB/T8731-2008, and the corresponding grade should be Y45 or Y45Mn
Chemical Composition:
- Carbon: 0.42~0.50
- Silicon: 0.10-0.40
- Manganese: 0.50~0.90
- Sulfur: 0.15~0.25
- Phosphorus: ≤0.060
Mechanical Properties:
- Tensile strength σb (MPa): 740-900
- Yield strength σs (MPa): 470
- Elongation δ5 (%): ≥5
- Reduction of area ψ (%): ≥15