665M17 / EN34
1.7% Nickel-Molybdenum Case Hardening Steel
£855.77 per tonne
Surcharge Price History for 665M17 / EN34
The surcharge data provided is based on the information available to us and represents an average of the surcharge mechanisms taken from various global steel producers. It is intended to only provide an indication of market movements and does not necessarily reflect the specific surcharges applied to individual material batches.
Rolled or Forged
Black Bar or Bright Bar
665M17 grade steel is a medium alloy nickel-molybdenum case-hardening steel which may be carburised and hardened to produce a hard wear resistant case developing a core strength of 770N/mm.
It has good impact properties, very good resistance to stock and freedom from temper brittleness.
60mm - 250mm Dia
Typical applications of 665M17 grade steel
- Valve rockers
- Track pins
- Steering balls and worms
- Transmission components
- Breech mechanisms
- Small arms parts
665M17 steel is still often referred to as EN34 steel - its equivalent grade under the previous BS 970: 1955 standard.