| Product Name | API Spec 5CT Casing Pipe |
| Material | H40 J55 K55 N80 M65 L80 L8013CR C90 C95 T95 P110 Q125 V150 |
| Technique | Seamless/EW |
| Standard | API 5CT |
| Out Diameter (OD) | 114.3-508mm |
| Wall Thickness (WT) | 5.21-22.22mm |
| Norminal Weight | 9.5-133.0(Ib/ft) |
| Length | R1 (5.49-6.71m), R2 (8.23-9.14m), R3 (11.58-13.72m) or as customer's requirements |
| Coupling | BTC, STC, LTC, NUE, EUE, VAM, BU or no thread |
| Usage | Oil/Gas Drilling |
| Outer Diameter | Wall Thickness | Thread | Length | ||
| in | mm | kg/m | lb/ft | ||
| 4 1/2" | 114.3 | 14.14-22.47 | 9.50-15.10 | LTC/STC/BTC | R1/R2/R3 |
| 5" | 127 | 17.11-35.86 | 11.50-24.10 | LTC/STC/BTC | R1/R2/R3 |
| 5 1/2" | 139.7 | 20.83-34.23 | 14.00-23.00 | LTC/STC/BTC | R1/R2/R3 |
| 6 5/8" | 168.28 | 29.76-35.72 | 20.00-24.00 | LTC/STC/BTC | R1/R2/R3 |
| 7" | 177.8 | 25.30-56.55 | 17.00-38.00 | LTC/STC/BTC | R1/R2/R3 |
| 7 5/8" | 193.68 | 35.72-63.69 | 24.00-42.80 | LTC/STC/BTC | R1/R2/R3 |
| 8 5/8" | 219.08 | 35.72-72.92 | 24.00-49.00 | LTC/STC/BTC | R1/R2/R3 |
| 9 5/8" | 244.48 | 48.07-86.91 | 32.30-58.40 | LTC/STC/BTC | R1/R2/R3 |
| 10 3/4" | 273.05 | 48.73-97.77 | 32.75-65.70 | LTC/STC/BTC | R1/R2/R3 |
| 11 3/4" | 298.45 | 62.50-89.29 | 42.00-60.00 | LTC/STC/BTC | R1/R2/R3 |
| 13 3/8" | 339.72 | 71.43-107.15 | 48.00-72.00 | LTC/STC/BTC | R1/R2/R3 |
| 16'' | 406.4 | 96.73-162.21 | 65.00-109.00 | LTC/STC/BTC | R1/R2/R3 |
| 18 5/8'' | 473.08 | 130.21 | 87.50 | LTC/STC/BTC | R1/R2/R3 |
| 20'' | 508 | 139.89-197.93 | 94.00-133.00 | LTC/STC/BTC | R1/R2/R3 |
| Group | Grade | Type | C | Mn | Mo | Cr | Ni max. | Cu max. | P max. | S max. | Si max. | ||||
| min. | max. | min. | max. | min. | max. | min. | max. | ||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 1 | H40 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
| J55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| K55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| N80 | 1 | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| N80 | Q | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - | |
| R95 | - | - | 0.45 c | - | 1.9 | - | - | - | - | - | - | 0.03 | 0.03 | 0.45 | |
| 2 | M65 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
| L80 | 1 | - | 0.43 a | - | 1.9 | - | - | - | - | 0.25 | 0.35 | 0.03 | 0.03 | 0.45 | |
| L80 | 9Cr | - | 0.15 | 0.3 | 0.6 | 0.9 | 1.1 | 8 | 10 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1 | - | - | 12 | 14 | 0.5 | 0.25 | 0.02 | 0.01 | 1 | |
| C90 | 1 | - | 0.35 | - | 1.2 | 0.25 b | 0.85 | - | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| T95 | 1 | - | 0.35 | - | 1.2 | 0.25 d | 0.85 | 0.4 | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| C110 | - | - | 0.35 | - | 1.2 | 0.25 | 1 | 0.4 | 1.5 | 0.99 | - | 0.02 | 0.005 | - | |
| 3 | P110 | e | - | - | - | - | - | - | - | - | - | - | 0.030 e | 0.030 e | - |
| 4 | Q125 | 1 | - | 0.35 | 1.35 | - | 0.85 | - | 1.5 | 0.99 | - | 0.02 | 0.01 | - | |
| a The carbon content for L80 may be increased up to 0.50 % maximum if the product is oil-quenched. b The molybdenum content for Grade C90 Type 1 has no minimum tolerance if the wall thickness is less than 17.78 mm. c The carbon content for R95 may be increased up to 0.55 % maximum if the product is oil-quenched. d The molybdenum content for T95 Type 1 may be decreased to 0.15 % minimum if the wall thickness is less than 17.78 mm. e For EW Grade P110, the phosphorus content shall be 0.020 % maximum and the sulfur content 0.010 % maximum. NL = no limit. Elements shown shall be reported in product analysis. |
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Mechanical Properties
| Standard | Type | Tensile Strength MPa |
Yield Strength MPa |
Hardness Max. |
| API SPEC 5CT | J55 | ≥517 | 379 ~ 552 | ---- |
| K55 | ≥517 | ≥655 | --- | |
| N80 | ≥689 | 552 ~ 758 | --- | |
| L80(13Cr) | ≥655 | 552 ~ 655 | ≤241HB | |
| P110 | ≥862 | 758 ~ 965 | ---- |
