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4140 mod 30-36HRc - 1% Chromium-Molybdenum Through Hardening Steel

Surcharge

Scrap has fallen again for June 2019 on the back of reduced demand. Combined with slight falls in alloys, this has seen an overall reduction in surcharges this month.

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

info
£248.59 per tonne

Surcharge Price History for 4140 mod 30-36HRc

AUG 18 NOV 18 FEB 19 MAY 19 TODAY
£334.30 £332.23 £307.73 £299.41 £248.59

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.

Typical applications of 4140 mod 30-36HRc grade steel

  • Tool joints in drill stem assemblies 

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PRODUCTION METHOD

Rolled or Forged

FINISHES

Black Bar or Bright Bar