4145 mod
1.1% Chromium-Molybdenum Through Hardening Steel
Surcharge
£463.06 per tonne
Surcharge Price History for 4145 mod
| AUG 23 | NOV 23 | FEB 24 | MAY 24 | TODAY |
|---|---|---|---|---|
| £502.44 | £511.90 | £488.23 | £446.19 | £463.06 |
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.
Product Method
Rolled or Forged
Finishes
Black Bar or Bright Bar
Description
4145 mod grade steel is a chromium-molybdenum through hardening steel typically used for downhole applications.
Similar to 4140, except with a higher carbon level resulting in greater strength, hardenability and ruling sections, which makes this grade more suitable for applications with larger section size and higher strength requirements.
In the ‘as-quenched’ state, hardnesses of 55-62HRc are achievable.
This grade demonstrates good forgeability but must be controlled through cooling due to its susceptibility to cracking. Care should also be taken when quenching, ensuring control over the quench medium, for the same reasons.
Impact toughness is reduced due to the increased carbon content. Weldability is also poor and is often carried out by more sophisticated methods such as plasma arc or electron beam.
Size Range
32mm - 860mm Dia
Typical applications of 4145 mod grade steel
- Drill collars
- Drill bits
- Crossover subs
- Tool joints