AISI 4130

Low alloy 4130:ASTM A29 (VO1.05)

Chemical composition

Various hybrid analyses are available to improve the hardenability of the grade.
C Si Mn P S Cr Mo Fe
Min 0.28 0.15 0.40 0.80 0.15 0.00
Max 0.33 0.35 0.60 0.035 0.040 1.10 0.25 0.00

Mechanical properties

Condition: Hardened and Tempered to 22 HRC max.

NACE MR0175 limits the supply hardness to 22HRC max.
U.T.S 85 KSI Min (586 N/mm2)
0.2% Proof Stress 60 KSI Min (414 N/mm2)
Elongation 20 %
Red of Area 40 %
Size range: 3”∅ - 51”∅

General scope

AISI 4130 low alloy steel containing nominally 0.3% Carbon, 1% Chromium and 0.2% Molybenum is widely used in oil patch applications. It is similar to 4140 which has a higher carbon level giving 4130 improved weldability, at the expense of through thickness strength.

The hardenability limitations of this grade (depth to which it will harden / obtain the specified mechanical properties after heat treatment) must always be taken into account when designing and selecting equipment.

Primarily manufactured in:

  • Dubai, UAE
  • Edmonton, Canada
  • Houston, Texas
  • Sheffield, England
  • Singapore

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