4140 mod 30-36HRc - 1% Chromium-Molybdenum Through Hardening Steel
Surcharge Information
Due to the UK’s mostly commonly recognised surcharge mechanism no longer being openly published to the UK market we are unable to provide specific surcharge information on our website at this stage.
We are currently working with our suppliers to establish alternative mechanisms in order to provide a comprehensive and transparent view of global surcharge variations.
Look out for our improved surcharge pages appearing in the coming weeks.
Description
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.
Size Range
32mm - 240mm Dia
Typical applications of 4140 mod 30-36HRc grade steel
- Tool joints in drill stem assemblies
Share this page
PRODUCTION METHOD
Rolled or Forged
FINISHES
Black Bar or Bright Bar