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

Surcharge

The surcharge information provided is a guide to market scrap and alloy surcharges and is an averaged value taken from various suppliers’ surcharge mechanisms and isn’t therefore necessarily the surcharge applied to all material supplied. Please contact us if you want any further information.

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£188.20 per tonne

Surcharge Price History for 4140 mod 18-22HRc

SEP 19 DEC 19 MAR 20 JUN 20 TODAY
£272.68 £191.60 £243.49 £262.21 £188.20

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.

Size Range

32mm - 860mm Dia

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

Grades for Potential Substitution (Lesser)