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4140 mod 18-22HRc - 1% Chromium-Molybdenum Through Hardening Steel for Oilfield Applications

Surcharge

The Scrap surcharge has reduced for February 2019 as a consequence of lower production volumes at the end of 2018 and a realignment with other European scrap surcharges.

Surcharge information as listed via Liberty Speciality Steels where possible, other based on mean chemical analysis for the given grade.

info
£307.73 per tonne

Surcharge Price History for 4140 mod 18-22HRc

FEB 18 MAY 18 AUG 18 NOV 18 TODAY
£298.88 £298.75 £334.30 £332.23 £307.73

Description

4140 mod 18-22HRc 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, but 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. 

This grade is also available in 30-36HRc condition for higher strength applications.

Typical applications of 4140 mod 18-22HRc grade steel

  • Tool joints in drill stem assemblies 
  • Oil & gas applications for sour service

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PRODUCTION METHOD

Rolled or Forged

FINISHES

Black Bar or Bright Bar