Grade Designations.
| BS EN 10084:2008 | 14NiCr14 / 1.5752 |
| BS 970:1991 (withdrawn) | 655M13 |
| AISI/SAE | 3415 / 3316 |
| DIN | 14NiCr14 / 1.5752 |
| ISO | 14NiCr14 |
Availability & Supply Condition.
Bright Rounds: 16–100mm | Black Rounds: 60–300mm
Supply condition: Bright Drawn or Hot Rolled Black. Supplied in the annealed or normalised condition ready for carburising.
Cut to length from 1 piece — −0/+2mm standard tolerance — 2–3 day turnaround — Cutting service details ›
Chemical Analysis.
Values shown as percentages by weight (% wt). Values are ranges unless stated as maxima.
| Designation | C | Si | Mn | P max | S max | Cr | Ni |
|---|---|---|---|---|---|---|---|
| 655M13 | 0.08–0.16 | 0.10–0.35 | 0.35–0.70 | 0.04 | 0.04 | 0.60–1.00 | 3.00–3.75 |
| 14NiCr14 | 0.11–0.17 | 0.17–0.37 | 0.30–0.60 | 0.025 | 0.035 | 0.50–0.80 | 3.00–3.75 |
For full chemical analysis with heat number, request an EN 10204 3.1 material test certificate when ordering — available on all alloy grades. Certificate types explained ›
Mechanical Properties.
Values shown for standard supply condition. Properties vary by section size and heat treatment condition.
| Condition | Core Tensile (N/mm²) | Core Yield (N/mm²) | Case HRC | Core HB |
|---|---|---|---|---|
| After case hardening | ~930–970 | ~700–720 | 58–63 | ~280–300 |
Hardness values: see our hardness conversion table to convert between HRC, HB, HV and tensile strength.
Typical Applications.
- Heavily loaded gears — automotive and industrial
- Camshafts and valve trains
- Rollers and cams
- Vehicle transmission and differential components
- Aerospace gearing
- Heavily stressed shafts requiring hard case
Key Benefits.
- Exceptional core toughness after carburising
- Very hard case: 58–63 HRC after carburising and hardening
- High nickel content provides excellent impact resistance in core
- Superior to 8620 for heavily shock-loaded applications
- Consistent carburising response due to controlled chemistry
Remarks & Guidance.
Carburise at 880–930°C. Oil quench. Temper at 150–180°C. For most automotive applications where cost is important, 8620 (805M20) provides adequate performance.
Relevant Heat Treatment Processes.
This grade responds to the following heat treatment processes. Click any card for temperatures, cooling methods and expected hardness values.
