EN34 (665M17) Engineering steel
EN34 (665M17) is a 2% nickel, molybdenum case hardening steel grade. EN34 (665M17) is suitable for applications requiring wear resistance and shock resistance.
It offers good core strength and impact properties with little temper brittleness. Combining good core strength, toughness and fatigue resistance EN34 (665M17) can be case hardened up to 60HRc.
Steel stock range
High Peak Steels stock EN34 (665M17) in round bar.
Associated standards
UK Standard EN34 | SAE/AISI 4615
EN34 (665M17) Black
| Product | Min size | Max size |
|---|---|---|
 | 50mm dia | 200mm dia |
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EN34 (665M17) Chemical Composition
| C | Si | Mn | S | P | Cr | Ni | Mo | |
|---|---|---|---|---|---|---|---|---|
| Min | 0.14 | 0.1 | 0.35 | 1.5 | 0.2 | |||
| Max | 0.2 | 0.4 | 0.75 | 0.04 | 0.035 | 0.3 | 2 | 0.3 |
EN34 (665M17) Mechanicals
| Yield N/mm2 | 0.2% proof N/mm2 | UTS (Rm) N/mm2 | Elong (A) % | Red of Area (Z) % | Hardness HB | Impact Test (KV) J |
|
|---|---|---|---|---|---|---|---|
| Normalised | 207 | ||||||
| Quenched & Tempered | 770mm max | 12 |
EN34 (665M17) Typical applications
- Automotive parts
- Case Harden Products
- Pinions
- Gears
- Track Rod Pins
- Heavy Duty Engineering components
- Transmission components