Case Hardening Steels Technical Catalogue
Steels designed for surface hardening by carburizing. Superior performance with hard surface and tough core structure.
Steel Groups
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Chromium-Manganese Alloyed Case Hardening Steel
Alloyed case hardening steel with high hardenability, providing excellent surface hardness and tough core after carburizing. Industry standard for gears, piston pins, and transmission components.
Dimension & Profile Table
| Profile | Size Range (mm) | Tolerance | Standard Length (m) | Delivery Condition |
|---|---|---|---|---|
| Round | 5 - 20 | h9 | 3 | +AC / +C |
| Round | 20 - 60 | h9, h10 | 3 | +AC / +C |
| Round | 60 - 120 | h10, h11 | 3 | +AC / +C |
| Hexagon | 6 - 30 | h9 | 3 | +C |
| Hexagon | 30 - 70 | h10, h11 | 3 | +C |
| Square | 6 - 30 | h9 | 3 | +C |
| Square | 30 - 70 | h10, h11 | 3 | +C |
Key Features
- High hardenability (deep case depth achievable)
- Hard, wear-resistant surface after carburizing
- Soft, impact-absorbing, tough core structure
- Excellent resistance to variable and impact loads
- Suitable for precision cold drawing
- Good dimensional stability after heat treatment
- Excellent gear blank material
- Good weldability (before case hardening)
Applications
- Gears and pinions
- Camshafts
- Piston pins
- Worm gears
- Drive shafts
- Bearing races
- Automotive transmission parts
- Agricultural machinery gears and shafts
- Industrial gearbox components
Technical Notes
- Carburizing temperature: 900-950°C (typical duration: 2-12 hours depending on part size)
- Case depth (CHD): Typically 0.5-2.0mm
- Post-carburizing heat treatment: Water or oil quench + temper at 150-200°C
- Surface hardness: 58-63 HRC (after carburizing + quenching)
- Core hardness: 30-45 HRC (depends on section size and quench medium)
- Delivery condition: +AC (annealed) or +C (cold drawn)
- Annealing temperature before cold drawing: 650-700°C
Detailed Technical Information and Quotation
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