24 July 2021 Gear Steel Bar
18CrMnBH Gear Steel Bar
18CrMnMoB belongs to the gear steel, is a lower chromium content, but also does not contain nickel forgings steel, good hardenability, strength and stability of large cross-section, better forging, welding and cutting process performance, high temperature Performance is better.
18CrMnMoB gear steel for the manufacture of large working temperature below 450 ℃ high strength forgings, such as the wheel hub thickness of more than 300mm impeller, diameter greater than φ500mm spindle rotor and welding structure, etc .; can be used for casting.
Chemical Composition:
| C | Si | Mn | S | P | Cr | Mo | B |
|---|---|---|---|---|---|---|---|
| 0.17~0.23 | 0.20~0.40 | 1.20~1.50 | ≤0.030 | ≤0.030 | 1.50~1.80 | 0.45~0.55 | 0.001~0.0035 |
Mechanical properties:
| Tensile strength σb (MPa): | Yield Strength σs (MPa): | Elongation: | Impact toughness value αkv (J / cm2): | Hardness: |
|---|---|---|---|---|
| 785 | 585 | 5% | 49 | 269~302HB |
Heat treatment specifications:
880 ℃ oil quenching, tempering 500 ~ 570 ℃.