API Grade -
5CT or 5D Yield Strength - Minimum Yield Strength - Maximum Tensile Strength - Minimum Rockwell C Hardness (est. )
H-40 40, 000 psi 80, 000 psi 60, 000 psi 70-87 HRB
J-55 55, 000 80, 000 75, 000 0-15
K-55 55, 000 80, 000 95, 000 14-25
S-80 55, 000 95, 000 95, 000 14-22
C-75 75, 000 90, 000 95, 000 14-26
L-80 80, 000 95, 000 95, 000 14-23
N-80 80, 000 110, 000 100, 000 16-25
S-95 95, 000 110, 000 110, 000 22-31
P-110 110, 000 140, 000 125, 000 27-35

OD W/T Inch mm inch mm
4 1/2 114.3 0.205-0.337 5.21-9.56
5 127 0.220-0.500 5.59-12.70
5 1/2 139.7 0.244-0.415 6.20-10.54
6 5/8 168.3 0.288-0.475 7.32-12.06
7 177.8 0.231-0.540 5.87-13.72
7 5/8 193.68 0.300-0.625 7.62-15.88
8 5/8 219.1 0.264-0.557 6.71-14.15
9 5/8 244.5 0.312-0.595 7.92-15.11
10 3/4 273.1 0.279-0.595 7.09-15.11
11 3/4 298.45 0.333-0.489 8.46-12.42
13 3/8 339.73 0.330-0.514 8.38-13.06
16 406.4 0.375-0.625 9.52-15.88
18-5/8 473.0 0.375-0.656 9.52-16.13
20 508.0 0.375-0.656 9.52-16.13