OCTG Expertise
OCTG
OCTG refers mainly to well casing and tubing — items subject to extreme stress in today's oil and gas industry. Continental began its existence specializing in OCTG, and remains a leader in understanding the needs of the drilling and completion sector.
🛢️ OCTG
OCTG Grades
Oil country tubular goods can be either seamless (hot-pierced) or seam-welded. The seamed, electric-resistance-welded material costs less than seamless, and is available in almost every American Petroleum Institute grade. The ERW process uses both heat and pressure to create a true forged weld. Some end users, however, feel the weld represents a liability — and for critical applications such as offshore extraction, seamless is preferred. See API Specification 5CT for Casing and Tubing for a complete description of sizes, grades and performance properties of OCTG.
Key Characteristics
- Subject to extreme stress in oil and gas environments
- Available in seamless hot-pierced or seam-welded forms
- ERW options provide a lower-cost forged weld solution
- Seamless preferred for critical offshore applications
- Offered in multiple diameters, grades, and wall thicknesses
- Available in carbon, stainless, nickel, and chrome alloys
Applications
- Well casing
- Production tubing
- Drilling and completion operations
- Offshore extraction
- API 5CT casing and tubing programs
- High-demand oil and gas wells
K55
Mechanical Bar & Tube OCTG & Linepipe
General purpose pipe manufactured to API specification 5CT. Similar to J55 but the minimum tensile strength is higher
Composition:
| Element | Min % | Max % |
|---|---|---|
| P | - | 0.03 |
| S | - | 0.03 |
No mechanical properties available for this yield condition.
H40
OCTG & Linepipe
General purpose pipe manufactured to API specification 5CT.
Composition:
| Element | Min % | Max % |
|---|---|---|
| P | - | 0.03 |
| S | - | 0.03 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 414 MPa min | 60,000 psi min |
| Yield Strength | 276 MPa min 552 MPa max | 40,000 psi min 80,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
J55
OCTG & Linepipe
General purpose manufactured to API specification 5CT. Similar to K55, except that the minimum tensile strength is lower.
Composition:
| Element | Min % | Max % |
|---|---|---|
| P | - | 0.03 |
| S | - | 0.03 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 517 MPa min | 75,000 psi min |
| Yield Strength | 379 MPa min 552 MPa max | 55,000 psi min 80,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
N80
OCTG & Linepipe
General purpose pipe manufactured to API specification 5CT. Available in both standard Quench and Tempered API N80 and lower cost Normalized API N80 (walls less than 0.5"). Inspection, testing and dimensions are in accordance with API 5CT for grade N80. Charpy V-notch impact test absorbed energy results meet API SR16 and are lower in Normalized N80 than Quench and Tempered N80.
Composition:
| Element | Min % | Max % |
|---|---|---|
| P | - | 0.03 |
| S | - | 0.03 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 689 MPa min | 100,000 psi min |
| Yield Strength | 552 MPa min 758 MPa max | 80,000 psi min 110,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
L80
OCTG & Linepipe
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 (hydrogen sulfide) environments.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.43 |
| Mn | - | 1.9 |
| Ni | - | 0.25 |
| Cu | - | 0.35 |
| P | - | 0.03 |
| S | - | 0.03 |
| Si | - | 0.45 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 655 MPa min | 95,000 psi min |
| Yield Strength | 552 MPa min 655 MPa max | 80,000 psi min 95,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
| Hardness | 23 Max HRC 241 Max HBW | - - |
9Cr-L80
OCTG & Linepipe
Manufactured to API specification 5CT. This is a controlled yield strength material with a hardness testing requirement. Used in wells with carbon dioxide environments.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.15 |
| Mn | 0.3 | 0.6 |
| Mo | 0.9 | 1.1 |
| Cr | 8 | 10 |
| Ni | - | 0.5 |
| Cu | - | 0.25 |
| P | - | 0.02 |
| S | - | 0.01 |
| Si | - | 1 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 655 MPa min | 95,000 psi min |
| Yield Strength | 552 MPa min 655 MPa max | 80,000 psi min 95,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
| Hardness | 23 Max HRC 241 Max HBW | - - |
13Cr-L80
OCTG & Linepipe
Manufactured to API specification 5CT. This is a controlled yield strength material with a hardness testing requirement. Used in wells with carbon dioxide environments.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | 0.15 | 0.22 |
| Mn | 0.25 | 1 |
| Cr | 12 | 14 |
| Ni | - | 0.5 |
| Cu | - | 0.25 |
| P | - | 0.02 |
| S | - | 0.01 |
| Si | - | 1 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 655 MPa min | 95,000 psi min |
| Yield Strength | 552 MPa min 655 MPa max | 80,000 psi min 95,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
| Hardness | 23 Max HRC 241 Max HBW | - - |
C90
OCTG & Linepipe
API controlled yield strength grade generally for use in sour condensate wells. Extensive hardness testing is required along with SSCC testing per NACE Standard TM-0177-Method A. The minimum threshold stress required is 80 percent of specified minimum yield strength.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.35 |
| Mn | - | 1.2 |
| Mo | 0.25 | 0.85 |
| Cr | - | 1.5 |
| Ni | - | 0.99 |
| P | - | 0.02 |
| S | - | 0.01 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 689 MPa min | 100,000 psi min |
| Yield Strength | 621 MPa min 724 MPa max | 90,000 psi min 105,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
| Hardness | 25 Max HRC 255 Max HBW | - - |
T95
OCTG & Linepipe
API controlled yield strength grade. Generally for use in sour condensate wells. Extensive hardness testing is required along with SSCC testing per NACE Standard TM-0177-Method A. The minimum threshold stress required is 80 perfect of specified minimum yield strength.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.35 |
| Mn | - | 1.2 |
| Mo | 0.25 | 0.85 |
| Cr | 0.4 | 1.5 |
| Ni | - | 0.99 |
| P | - | 0.02 |
| S | - | 0.01 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 724 MPa min | 105,000 psi min |
| Yield Strength | 655 MPa min 758 MPa max | 95,000 psi min 110,000 psi max |
| Total Elongation Under Load | 0.500 % | - |
| Hardness | 25 Max HRC 255 Max HBW | - - |
C110
OCTG & Linepipe
API controlled yield strength grade generally for use in deeper sour condensate wells. Extensive hardness testing is required along with SSCC testing per NACE Standard TM-0177-Method A. The minimum threshold stress required is 85 percent of specified minimum yield strength.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.35 |
| Mn | - | 1.2 |
| Mo | 0.25 | 1 |
| Cr | 0.4 | 1.5 |
| Ni | - | 0.99 |
| P | - | 0.02 |
| S | - | 0.005 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 793 MPa min | 115,000 psi min |
| Yield Strength | 758 MPa min 827 MPa max | 110,000 psi min 120,000 psi max |
| Total Elongation Under Load | 0.700 % | - |
| Hardness | 30 Max HRC 286 Max HBW | - - |
P110
OCTG & Linepipe
API grade for general use in deep wells. This grade is not generally considered suitable for sour condensate wells.
Composition:
| Element | Min % | Max % |
|---|---|---|
| P | - | 0.03 |
| S | - | 0.03 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 862 MPa min | 125,000 psi min |
| Yield Strength | 758 MPa min 965 MPa max | 110,000 psi min 140,000 psi max |
| Total Elongation Under Load | 0.600 % | - |
Q125
OCTG & Linepipe
API grade for general use in deep wells. This grade is not generally considered suitable for sour condensate wells.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.35 |
| Mn | - | 1.35 |
| Mo | - | 0.85 |
| Cr | - | 1.5 |
| Ni | - | 0.99 |
| P | - | 0.02 |
| S | - | 0.01 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 931 MPa min | 135,000 psi min |
| Yield Strength | 862 MPa min 1,034 MPa max | 125,000 psi min 150,000 psi max |
| Total Elongation Under Load | 0.650 % | - |
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