20MnCr5 Bright Bar Manufacturer & Supplier
The mainstream European case hardening bar. Carburises predictably to a 0.6-1.2 mm case at 60 HRC, with enough manganese and chromium to keep the core strong in gear tooth sections.
UNS: 1.7147 / 20MnCr5 | Category: Case Hardening Steel
Size Range
Outer Diameter: Diameter 8-120 mm · Round, square, hexagon & flat sections
Chemical Composition (%)
| C | Mn | Cr | Si | P |
|---|---|---|---|---|
| 0.17-0.22 | 1.10-1.40 | 1.00-1.30 | 0.40 max | 0.025 max |
Mechanical Properties
- Tensile Strength
- 780-1080 MPa (core)
- Yield Strength
- 590 MPa min
- Elongation
- 10%
- Case hardness
- 58-62 HRC
Applicable Standards
- EN 10277-4 (case hardening bright steel)
- EN 10084 (case hardening steels)
- EN 10278 (dimensions & tolerances)
- ASTM A29 / A322
- EN 10204 3.1 certification
Applications
- Carburised gears
- Gearbox shafts
- Splined shafts
- Chain sprockets
- Pinion shafts
Industries Served
- Automotive & Auto Components
- Heavy Engineering
- Agricultural Equipment
- Textile Machinery
- General Engineering
- Pumps & Valves
Equivalent Grades
- AISI / SAE
- AISI 5120 / SAE 5120
- Werkstoff / DIN
- 1.7147
- JIS
- SMnC420