Grade Designations.
| BS EN 10084:2008 | 15NiCrMo16-5 / 1.6723 |
| BS 970:1991 (withdrawn) | 832M13 |
| AISI/SAE | 9315 |
| DIN | 15NiCrMo16-5 / 1.6723 |
| ISO | 15NiCrMo16-5 |
Availability & Supply Condition.
Bright Rounds: 25–100mm | Black Rounds: 60–300mm (enquire for availability)
Supply condition: Bright Drawn or Hot Rolled Black. Supplied in the annealed condition.
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 | Mo |
|---|---|---|---|---|---|---|---|---|
| 832M13 | 0.10–0.16 | 0.10–0.35 | 0.30–0.60 | 0.04 | 0.04 | 0.60–1.10 | 3.90–4.30 | 0.15–0.35 |
| 15NiCrMo16-5 | 0.12–0.17 | 0.17–0.37 | 0.30–0.60 | 0.025 | 0.025 | 0.70–1.00 | 3.80–4.30 | 0.15–0.30 |
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 | ~1050 | ~800 | 60–64 | ~310 |
Hardness values: see our hardness conversion table to convert between HRC, HB, HV and tensile strength.
Typical Applications.
- Critical aerospace gearing
- Defence transmission components
- Heavy industrial gearboxes — large sections
- High-performance motorsport drivetrain
- Large case-hardened shafts
Key Benefits.
- Highest specification standard EN case hardening grade
- Molybdenum addition improves large-section core hardenability
- Resists temper embrittlement
- Hard case: 60–64 HRC
- Exceptional core toughness — higher than EN36
Remarks & Guidance.
Specify EN36C / 832M13 only where performance of EN36B has been demonstrated insufficient — this is a premium-cost grade. Carburise at 880–930°C. Double-hardening procedure generally recommended. Temper at 150–180°C after final quench. Welding requires strict pre- and post-weld procedures.
Relevant Heat Treatment Processes.
This grade responds to the following heat treatment processes. Click any card for temperatures, cooling methods and expected hardness values.
