J55(37Mn5) &N80(36 Mn2V) API SPEC 5CT Tubing and Casing
Standard
| Grade | Chemical composition | ||||||||||
C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V | A1s | ||
API SPEC 5CT | J55K55(37Mn5 | 0.34~ 0.39 | 0.20~ 0.35 | 1.25~ 1.50 | ≤0.020 | ≤ 0.015 | ≤ 0.15 | ≤0.20 | ≤0.20 |
|
| ≤0.020 |
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 | |
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 | |
P110 | 0.26~ 0.35 | 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 | |
Thickness:1mm-60mm
Outer diameter:20mm-600mm
Standard:BS, JIS, GB, DIN, ASTM,
Technical:hot rolled
Origin: China(mainland)
Surface:Copper coated, Bared , oiled , black painted or as customers’requests
Packaging detail:wrapped with steel strip or as customers’ requests
Delivery detail:20days after receive your deposits
Length:as customers’ requests
Port:TIANJIN , SHANGHAI , AND SO ON
Usage:petroleum, chemical industry, electricity, boiler, construction ,and so on
Payment:30%T/T in advance,the balance against B/L copy
Section shape:round
Certification:ISO API
N80
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.
Available in casing dimensions of 114.3 mm (4.5") to 406.4 mm (16")
Available in tubing dimensions of 26.7 mm (1.05") to 114.3 mm (4.5")
Chemical Composition
| C | Mn | Mo | Cr | Ni | Cu | Ti | P | S | Si | V | Al | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | - | - | - | - | - | - | - |
| Max | - | - | - | - | - | - | - | 0.030 | 0.030 | - | - | - |
Mechanical Properties
| 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 % | - |
| Hardness |
J55
General purpose manufactured to API specification 5CT. Similar to K55, except that the minimum tensile strength is lower.
Available in casing dimnesions of 114.3 mm (4.5") to 508 mm (20")
Available in tubing dimensions of 26.7 mm (1.05") to 114.3 mm (4.5")
Chemical Composition
| C | Mn | Mo | Cr | Ni | Cu | Ti | P | S | Si | V | Al | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | - | - | - | - | - | - | - |
| Max | - | - | - | - | - | - | - | 0.030 | 0.030 | - | - | - |
Mechanical Properties
| 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 % | - |
| Hardness | - | - |
Scope:
This Standard specifies the technical delivery conditions for steel pipes (casing, tubing and pup joints), coupling stock, coupling material and accessory material and establishes requirements for three Product Specification Levels (PSL-1, PSL-2, PSL-3).
The requirements for PSL-1 are the basis of this Standard.
The requirements that define different levels of standard technical requirements for PSL-2 and PSL-3, for all Grades except H-40, L-80 9Cr and C110, are contained in Annex H.
Peotroleum and natureal gas industies – Steel pipes for use as casing or tubing for wells.
Standard: API SPEC 5CT
API 5CT pipe Size (mm):
- Outer Dimensions: 6.0mm – 219.0mm
- Wall Thickness: 1.0mm – 30 mm
- Length: max 12000mm
Application: gas, water and oil transportation in both oil and natural gas .
The main steel grade of API 5CT:
- API 5CT J55, API 5CT K55, API 5CT N80, API 5CT L80, API 5CT P110.
Packing: Bare/bundles/crates/crate protection at the both sides of tubes or as per customers’ requirements .
This International Standard is applicable to the following connections in accordance with ISO 10422 or API Spec 5B:
- short round thread casing (STC);
- long round thread casing (LC);
- buttress thread casing (BC);
- extreme-line casing (XC);
- non-upset tubing (NU);
- external upset tubing (EU);
- integral joint tubing (IJ).
For such connections, this International Standard specifies the technical delivery conditions for couplings and thread protection.
For pipes covered by this International Standard, the sizes, masses, wall thicknesses, grades and applicable end finishes are defined.
This International Standard may also be applied to tubulars with connections not covered by ISO/API standards.
2. 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 |
Mechanical Properties of API 5CT
| 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 |
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Alloy Seamless Tube: ASME SA-335 (P5, P9, P11, P22 P91) A213 -T22/T12 etc.
Hollow seamless bar :AISI 4130 ,ASTM 4140 etc.
Carbon steel pipe :ASTM A106 Gr.B
Stainless steel pipe : 304, 316, 316L & H grades etc.
Hollow section :S235JR, S275JR, S355JR, P265GH, P355N
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