Grade 4130 : 4140 : 4145 Tube

ASTM A519 (VO1.01)

Chemical composition

AISI 4130

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 0.040 0.040 1.10 0.25 0.00

AISI 4140

C Si Mn P S Cr Mo Fe
Min 0.38 0.15 0.75 0.80 0.15 0.00
Max 0.43 0.35 1.00 0.040 0.040 1.10 0.25 0.00

AISI 4145

C Si Mn P S Cr Mo Fe
Min 0.43 0.15 0.75 0.80 0.15 0.00
Max 0.48 0.35 1.00 0.040 0.040 1.10 0.25 0.00

Mechanical properties

Condition: Hardened and Tempered to 22 HRC max.

U.T.S 100 KSI Min (689 N/mm2)
0.2% Proof Stress 80 KSI Min (551 N/mm2)
Elongation 20 %
Red of Area 40 %

Condition: Hardened and Tempered to 30-36 HRC

NACE MR0175 limits the supply hardness to 22 HRC max.
U.T.S 130 KSI Min (896 N/mm2)
0.2% Proof Stress 110 KSI Min (758 N/mm2)
Elongation 13 %
Red of Area 30 %
Size range: From ”∅ OD up to 2”∅ OD with wall thickness 0.2”∅ to ”∅

General scope

Stocked through a wide range of sizes, in either mechanical tube, casing or DOM (drawn over mandrel) product forms.

These grades of low alloy steel containing Chromium and Molybdenum are the most widely used alloy for oil patch applications. Usually supplied in the hardened and tempered condition at 22 HRC max. They also find favour in many applications requiring higher strength levels up to 150 KSI 0.2% PS. The grade is not NACE MR0175 approved in these conditions, and should not be used in environments containing H2S.

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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