| Size: OD13.7-114.3mm |
| WT0.9-16.5mm |
| Length22000mm Max. |
| |
| Description: |
| 1. Tubes are made by the seamless process and are cold finished. |
| 2. Cold finished tubes are heat treated after the final cold-finishing at a temperature of 1200°F [650°C] or higher, or tubing may be furnished in the full-annealed, isothermal annealed, or normalized and tempered condition. If furnished in the normalized and tempered condition, the minimum |
| tempering temperature shall be 1200°F [650°C] |
| 3. Finished tubes are free of scale. |
| Chemical composition |
|
|
| |
Grade T1 |
Grade T1a |
Grade T1b |
| C: |
0.10-0.20% |
0.12-0.25% |
0.14% Max. |
| Mn: |
0.30-0.80% |
0.30-0.80% |
0.30-0.80% |
| P: |
0.025% Max. |
0.025% Max. |
0.025% Max. |
| S: |
0.025% Max. |
0.025% Max. |
0.025% Max. |
| Si: |
0.10-0.50% |
0.10-0.50% |
0.10-0.50% |
| Mo: |
0.44-0.65% |
0.44-0.65% |
0.44-0.65% |
| Mechanical properties |
| |
Grade T1 |
Grade T1a |
Grade T1b |
| Tensile strength: |
380MPa Min. |
365MPa Min. |
415MPa Min. |
| Yield strength: |
205MPa Min. |
195MPa Min. |
220MPa Min. |
| Elongation (in 50mm): |
30% Min. |
30% Min. |
30% Min. |
|
