Chromium Content
Chrome Steel
Chromium is a hard metal that adds corrosion resistance when alloyed with steel. Alone, it polishes to a mirror-like shine — that's why it's often used as decorative plating, where it's called "chrome." For oil and gas industry steel products, Continental adds varying quantities of chromium to molten steel to create the best and most cost-effective alloy solutions.
🛡️ Chrome Steel
Chrome Steel Grades
These metals are used in mildly corrosive environments containing chlorides, carbon dioxide and low hydrogen sulphate concentrations. Chromium is a hard metal that adds corrosion resistance when alloyed with steel. Alone, it polishes to a mirror-like shine — that's why it's often used as decorative plating, where it's called 'chrome.' For oil and gas industry steel products, Continental adds varying quantities of chromium to molten steel to create the best and most cost-effective alloy solutions.
Key Characteristics
- Higher chromium content than alloy steels
- Improved corrosion resistance
- Cost-effective alternative to stainless
- Better resistance in CO2 and mild chloride environments
- Superior to carbon steel in corrosive conditions
Applications
- CO2 environments
- Mildly saline conditions
- Low hydrogen sulphate exposure
- Oil and gas wellbores
- Moderate corrosion resistance requirements
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.
9CR
Mechanical Bar & Tube
General purpose pipe manufactured to ASTM Specification 519. Similar to 4140 (which has a lower carbon level), 9CR has improved hardenability and is more commonly used in the higher strength >= 110ksi condition.
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | 0.09 | 0.15 |
| Mn | 0.3 | 0.6 |
| Mo | 0.9 | 1.1 |
| Cr | 8 | 10 |
| Ni | - | 0.25 |
| Cu | - | 0.25 |
| P | - | 0.02 |
| S | - | 0.01 |
| Si | - | 1 |
| Al | - | 0.04 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 689 MPa min | 100,000 psi min |
| Yield Strength | 552 MPa min 655 MPa max | 80,000 psi min 95,000 psi max |
| Total Elongation Under Load | 20.000 % | - |
| Hardness | 22 Max HRC | - |
13CR (420 Mod)
Mechanical Bar & Tube
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | 0.18 | 0.22 |
| Mn | 0.4 | 1 |
| Mo | - | 0.5 |
| Cr | 12.5 | 14 |
| Ni | - | 0.2 |
| Cu | - | 0.2 |
| P | - | 0.02 |
| S | - | 0.005 |
| Si | - | 0.8 |
| V | - | 1 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 689 MPa min | 100,000 psi min |
| Yield Strength | 552 MPa min 655 MPa max | 80,000 psi min 95,000 psi max |
| Total Elongation Under Load | 20.000 % | - |
| Hardness | 22 Max HRC | - |
S13CR Nace Equiv.
Mechanical Bar & Tube
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.03 |
| Mn | - | 1 |
| Mo | 1.5 | 2.5 |
| Cr | 11.5 | 13.5 |
| Ni | - | 6 |
| Ti | - | 0.5 |
| P | - | 0.02 |
| S | - | 0.005 |
| Si | - | 0.5 |
| V | - | 0.5 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 724 MPa min | 105,000 psi min |
| Yield Strength | 655 MPa min 827 MPa max | 95,000 psi min 120,000 psi max |
| Total Elongation Under Load | 20.000 % | - |
| Hardness | 28 Max HRC | - |
25CR
Mechanical Bar & Tube
Composition:
| Element | Min % | Max % |
|---|---|---|
| C | - | 0.025 |
| Mn | - | 0.8 |
| Mo | 3 | 4 |
| Cr | 24 | 26 |
| Ni | - | 8 |
| Cu | - | 2 |
| P | - | 0.025 |
| S | - | 0.002 |
| Si | - | 0.8 |
| Mechanical Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 814 MPa min | 118,000 psi min |
| Yield Strength | 586 MPa min | 85,000 psi min |
| Total Elongation Under Load | 30.000 % | - |
| Hardness | 28 Max HRC | - |
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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