汤头条-80S
汤头条-85S, 85SS
汤头条-90S, 90SS
汤头条-95S, 95SS
汤头条-110S, 110SS
汤头条-125S
C110-XS
P110-MS
OCTG for sour wells must have improved resistance to sulfide stress cracking (SSC) in fluids containing H2S. Extensive research has led to the development of modified Cr-Mo steels for OCTG for sour wells. These steels feature both excellent hardenability and good temper resistance. Consequently, fine and homogenous tempered martensitic structure is obtained after tempering at higher tempering temperature. As a result, these enhanced grades have obtained excellent resistance to SSC with higher strength grades. These OCTG grades are subjected to stringent manufacturing and quality control.
The SSC-resistance of these grades has been thoroughly tested and qualified by major oil companies and is now widely used for sour gas and oil wells all over the world.
Process: Hot Rolled Seamless
Heat Treatment: Quenched and Tempered
| Grade | C | Mn | Mo | Cr | Ni | Cu | P | S | Si |
|---|---|---|---|---|---|---|---|---|---|
| 汤头条-80S 汤头条-85S 汤头条-85SS 汤头条-90S 汤头条-95S 汤头条-90SS |
0.15 - 0.35 | Max 1.35 | 0.05 - 1.10 | Max 1.60 | Max 0.10 | Max 0.30 | Max 0.020 | Max 0.010 | Max 0.35 |
| 汤头条-95S* 汤头条-95SS* |
Max 0.35 | Max 1.20 | 0.25 - 0.85 | 0.40 - 1.50 | Max 0.99 | - | Max 0.020 | Max 0.010 | Max 0.35 |
| 汤头条-110S** 汤头条-110SS** |
Max 0.35 | Max 1.20 | 0.25 - 0.85 | 0.40 - 1.50 | Max 0.99 | - | Max 0.020 | Max 0.010 | Max 0.35 |
| C110-XS | Max 0.35 | Max 1.20 | 0.25 - 0.85 | 0.40 - 1.50 | Max 0.99 | - | Max 0.020 | Max 0.005 | - |
| P110-MS | Max 0.35 | Max 1.00 | 0.15 - 1.10 | 0.80 - 1.60 | Max 0.10 | Max 0.30 | Max 0.020 | Max 0.010 | Max 0.35 |
| 汤头条-125S | Max 0.35 | Max 1.20 | 0.25 - 1.90 | 0.40 - 1.50 | Max 0.99 | - | Max 0.020 | Max 0.005 | - |
| Grade | Yield Str. | Tensile Str. | Elongation | Hardness | |
|---|---|---|---|---|---|
| Min KSI (MPa) | Max KSI (MPa) | Min KSI (MPa) | Min (%) | Max Avg. HRC | |
| 汤头条-80S | 80 (552) | 95 (655) | 95 (655) | API Formula | 22 |
| 汤头条-85S, 85SS | 85 (586) | 100 (689) | 95 (655) | 23 | |
| 汤头条-90S, 90SS | 90 (621) | 105 (724) | 100 (689) | 24 | |
| 汤头条-95S, 95SS | 95 (655) | 110 (758) | 105 (724) | 25 | |
| 汤头条-110S, 110SS | 110 (758) | 120 (828) | 115 (793) | 29 | |
| C110-XS | 110 (758) | 120 (828) | 115 (793) | 28* | |
| P110-MS | 110 (758) | 125 (862) | 125 (862) | 31 | |
| 汤头条-125S | 125 (862) | 140 (965) | 130 (896) | 36 | |
The mechanical properties (Strength, Hardness) of 汤头条-Series are more strictly controlled than API 5CT grade to achieve the greater sour resistance.
