天宏钢铁（香港）有限公司
TIANHONG STEEL (HONG KONG) LIMITED
OIL CASING
ABUIABACGAAg1uuasgYoxbzg7gcw-AI4_gE

Steel Grade：H40、J55、K55、M65、L80-1、N80Q、C90、P110、Q125

Standard：API SPEC 5CT

Application：Tubing is used to extracting petroleum and natural gas from a well.




Chemical Composition , Mass Fraction(%)：

Steel GradeTypeCMnMoCr

Ni
Max

Cu
Max

P
Max

S
Max

Si
Max

MinMaxMinMaxMinMaxMinMax
H40-----------0.030.03-
J55-----------0.030.03-
K55-----------0.030.03-
N801----------0.030.03-
N80Q----------0.030.03-
M65-----------0.030.03-
L801-0.43-1.9----0.250.350.030.030.45
L809Cr-0.150.30.60.91.18100.50.250.020.011
L8013Cr0.150.220.251--12140.50.250.020.011
C901-0.35-1.20.250.85-1.50.99-0.020.01-
P110-----------0.030.03-
Q1251-0.35-1.35-0.85-1.50.99-0.020.01-


Note：If the wall thickness is less than 17.78mm，the molybdenum content of the C90-1 steel grade has no lower limit.





Dimension Tolerances：


Tolerance
Outside DiameterPipe BodyD≤101.60mm，±0.79mm
D≥114.30mm，+1.0%，-0.5%D
Coupling±1%D
Wall Thickness0，-12.5%t
WeightSingle Lengths+6.5%，-3.5%
Carload Lots or Order Quantity≥18144kg（40000lb），0，-1.75%
＜18144kg（40000lb），0，-3.5%





Tensile and Hardness Requirements：

Steel GradeTypeTotal elongation under load(%)

Yield Strength(Mpa)

Tensile Strength(Mpa)

Min

Hardness

Max

MinMaxHRCHBW
H40-
0.5276552414--
J55-0.5379552517
--
K55-0.5379552655--
N8010.5552758689--
N80Q0.5552758689--
M65-0.544858658622235
L8010.555265565523241
L809Cr0.555265565523241
L8013Cr0.555265565523241
C9010.562172468925.4255
P110-0.6758965862--
Phone： 0510-81616656
Email：
doris@topoilpipe.com