Tubing API 5CT

Origin: China Standard: API 5CT
Steel Grade: J55, K55, L80, N80, C90, C95, T95, P110. 
Tubing size: 1.9"-4 1/2"
Casing size: 4 1/2"-13 7/8"
End finish: Plain end; Non-upset threaded and coupled; External upset threaded and coupled. 
Thread: Short round thread; Long round tread; Buttress thread
Application: Tubing is used to extracting petroleum and natural gas from a well. Casing serves as walls of a well. 

Size Tolerance

OD Tolerance		WT Tolerance		length	Rang 1	Rang 2	Rang 3
D<114.3	D>=114.3			Tubing	6.10~7.32M	8.53~9.57M
±0.79	-0.5%,+1%	+/-12.50%		Casing	4.88~7.62M	7.62~10.36M	10.36~14.63M

Chemical Composition (%)

Grade	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	V	Als
J55,K55	0.34~0.39	0.20~0.35	1.25~1.5	≤0.02	≤0.015	≤0.15	≤0.20	≤0.20			≤0.020
N80	0.34~0.38	0.20~0.35	1.45~1.7	≤0.02	≤0.015	≤0.15				0.11~0.16	≤0.020
L80	0.15~0.22	≤1.00	0.25~1.0	≤0.02	≤0.010	12.0~14.0	≤0.20	≤0.20			≤0.020
P110	0.26~0.35	0.17~0.37	0.40~0.7	≤0.02	≤0.010	0.80~1.10	≤0.20	≤0.20	0.15~0.25	≤0.08	≤0.020

Mechanical properties

Grade	Tensile strength(Mpa)	Yield strength(Mpa)	Elongation (%)	Hardness
J55	≥517	379~552	Check the table
K55	≥517	≥655
N80	≥689	552~758
L80	≥655	552~655		≤241HB
P110	≥862	758~965

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Product Categories : Seamless Steel Pipe > Tubing and Casing