4140 mod 30-36HRc
1% Chromium-Molybdenum Through Hardening Steel
£597.94 per tonne
Surcharge Price History for 4140 mod 30-36HRc
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Rolled or Forged
Black Bar or Bright Bar
4140 mod 30-36HRc grade steel is a chromium-molybdenum steel used widely for drilling and completion parts in downhole applications.
It is a higher carbon version of 4130 resulting in greater strength and ruling sections. This grade can easily achieve yield strengths of 110KSI, however it should not be used in sour service environments above 22HRc (approx 80KSI Yield Strength).
4140 has poor weldability due to the risk of weld cracking, however machinability is fair and forgeability is very good.
32mm - 240mm Dia
Typical applications of 4140 mod 30-36HRc grade steel
- Tool joints in drill stem assemblies