• API 5CT raw seamless carbon steel pipes for OCTG casing and tubing couplings

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”)
Khorgos port(Пограничный пункт “Хоргос”)
→East Asia, Uzbekistan,Kazakhstan,Kyrgyzstan…(Train)
Erlianhot port→Mongolia(Train and Truck)
Manchuria port→Russia(Train and Truck)
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 — —

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