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API 5CT Specifications
API 5CT is standard technical
specifications for steel casing and tubing pipes used for oil wells in
petroleum and natural gas industries.
Outer Dimensions: 6.0mm – 219.0mm
Wall Thickness: 1.0mm – 30 mm
Length: max 12000mm
Mechanical Composition:
Steel Grade
Yield Strength (Mpa)
Tensile Strength (Mpa)
API 5CT J55
379-552
≥517
API 5CT K55
≥655
≥517
API 5CT N80
552-758
≥689
API 5CT L80
552-655
≥655
API 5CT P110
758-965
≥862
Chemical Composition:
Grade
C≤
Si≤
Mn≤
P≤
S≤
Cr≤
Ni≤
Cu≤
Mo≤
V≤
Als≤
API 5CT J55
0.34-0.39
0.20-0.35
1.25-1.50
0.020
0.015
0.15
0.20
0.20
/
/
0.020
API 5CT K55
0.34-0.39
0.20-0.35
1.25-1.50
0.020
0.015
0.15
0.20
0.20
/
/
0.020
API 5CT N80
0.34-0.38
0.20-0.35
1.45-1.70
0.020
0.015
0.15
/
/
/
0.11-0.16
0.020
API 5CT L80
0.15-0.22
1.00
0.25-1.00
0.020
0.010
12.0-14.0
0.20
0.20
/
/
0.020
API 5CT J P110
0.26-035
0.17-0.37
0.40-0.70
0.020
0.010
0.80-1.10
0.20
0.20
0.15-0.25
0.08
0.020
