API 5CT specifies the manufacture of OCTG pipes and couplings used in oilfield. Our company can produce OCTG couplings in different thread types, including short round thread, long round thread and buttress thread.
Specification
Standard | API 5CT latest edition |
Steel Grade/Material | H40/J55/L80/N80-1/N80Q/L80-13Cr/R95/C90/T95/C110/P110/Q125 |
Outer Diameter(OD) | 1.05”-4.5”(26.67mm-508mm) |
Length | According to the Standard and specification |
Packing | Thread protector,black paint and bundling |
Type of thread | STC/LTC/BTC/OEM |
Section Shape | Round |
Technique | Seamless hot rolled |
Application | Used to make steel couplings for OCTG casing pipes and tubing pipes |
Place of Origin | China |
MOQ | 1 ton |
Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
Chemical Composition(%) | |||||||||
Grade | C | Mn | Mo | Cr | Ni | Cu | P | S | Si |
N80-1/N80Q | ≤0.03 | ≤0.03 | — | ||||||
R95 | ≤0.45ᶜ | ≤1.9 | ≤0.03 | ≤0.03 | — | ||||
L80 | ≤0.43 | ≤1.9 | ≤0.03 | ≤0.03 | — | ||||
L80-1 | ≤0.15 | 0.30~0.60 | 0.90~1.10 | 8.00~10.0 | — | — | ≤0.03 | ≤0.03 | ≤0.45 |
L80-13Cr | 0.15~0.22 | 0.25~1.00 | 12.0~14.0 | ≤0.25 | ≤0.35 | ≤0.03 | ≤0.03 | ≤0.45 | |
C90 | ≤0.35 | ≤1.20 | 0.25ᵇ~0.85 | ≤1.50 | ≤0.5 | ≤0.25 | ≤0.02 | ≤0.01 | ≤1 |
T95 | ≤0.35 | ≤1.20 | 0.25ᵇ~0.85 | 0.40~1.50 | ≤0.5 | ≤0.25 | ≤0.02 | ≤0.01 | ≤1 |
C110 | ≤0.35 | ≤1.20 | 0.25~1.00 | 0.40~0.15 | ≤0.99 | — | ≤0.02 | ≤0.01 | — |
P110 | ≤0.99 | — | ≤0.02 | ≤0.01 | — | ||||
Q125 | ≤0.35 | 1.35 | ≤0.85 | ≤1.50 | ≤0.99 | — | ≤0.02 | ≤0.005 | — |
Mechanical properties | |||||
Grade | Total elongation under load(%) | Yield strength(Mpa) | Tensile strength(Mpa) | Hardness (HRC) | Hardness (HBW) |
H40 | 0.5 | 276~552 | 414 | — | — |
J55 | 0.5 | 379~552 | 517 | — | — |
K55 | 0.5 | 379~552 | 655 | — | — |
N80-1/N80Q | 0.5/0.5 | 552~758 | 689 | — | — |
R95 | 0.5 | 655 | 724 | — | — |
L80 | 0.5 | 552 | 655 | 23 | 241 |
L80-1/L80-9Cr | 0.5 | 552 | 655 | 23 | 241 |
L80-13Cr | 0.5 | 552 | 655 | 23 | 241 |
C90 | 0.5 | 621 | 689 | 25.4 | 255 |
T95 | 0.5 | 655 | 724 | 25.4 | 255 |
C110 | 0.7 | 758 | 793 | 30 | 286 |
P110 | 0.6 | 758 | 862 | — | — |
Q125 | 0.65 | 862 | 931 | — | — |