4130 Normalize & Annealed

4130 normalize & annealed properties

4130 (Chromoly) Normalized Alloy Steel

Minimum Properties

Ultimate Tensile Strength, psi

97,200

Yield Strength, psi

63,100

Elongation

25.5%

Rockwell Hardness

B92

4130 (Chromoly) Annealed Alloy Steel

Minimum Properties

Tensile Strength, psi

81,200

Yield Strength, psi

52,200

Elongation

28.2%

Rockwell Hardness

B82

Chemistry

Iron (Fe)

97.3 – 98.22%

Carbon (C)

0.28 – 0.33%

Chromium (Cr)

0.8 – 1.1%

Manganese (Mn)

0.4 – 0.6%

Molybdenum (Mo)

0.15 – 0.25%

Phosphorus (P)

0.035% max

Sulphur (S)

0.04% max

Silicon (Si)

0.15 – 0.35%

CHEMISTRY DATA : 

  

Carbon

0.28 – 0.33

Chromium

0.8 – 1.1

Manganese

0.7 – 0.9

Molybdenum

0.15 – 0.25

Phosphorus

0.035 max

Silicon

0.15 – 0.35

Sulphur

0.04 max

The properties requirements of spec L80 are: 

API L80

Minimum Yield Strength: 80,000 psi
Maximum Yield Strength: 95,000 psi
Minimum Tensile Strength: 95,000 psi
Hardness Requirement: 23 HRC maximum
Notes: Manufactured to API specification 5CT. This is a controlled yield strength material with a hardness testing requirement. L80 is usually used in wells with sour (H2S) environments.