41XX SERIES Mechanical Properties

Mechanical properties

Material

Condition

Tensile strength [psi (MPa)]

Yield strength [psi (MPa)]

Elongation in 2″ [%]

Hardness (Rockwell)

4130

Cold drawn—normalized[2]

85,000–110,000 psi (590–760 MPa)

70,000–85,000 psi (480–590 MPa)

20–30

B 90–96

4142

Hot rolled—annealed[2]

90,000–100,000 psi (620–690 MPa)

60,000–70,000 psi (410–480 MPa)

20–30

B 90–95

Cold drawn—annealed[2]

105,000–120,000 psi (720–830 MPa)

85,000–95,000 psi (590–660 MPa)

15–25

B 96–100

4150

Hot rolled—annealed[2]

90,000–110,000 psi (620–760 MPa)

65,000–75,000 psi (450–520 MPa)

20–30

B 90–96

 

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.