TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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JIS G 3465 Seamless Drill Steel Pipes and Tubes for Drilling for mineral exploration
JIS G 3465 Seamless Steel Tubes for Drilling
Dimension:OD 30-150mm, WT: 3-20mm
Application :for Drill rod, Casing tube, Core tube
| CHEMICAL COMPOSITION % max | |
| C | Si |
| 0.04 | 0.04 |
| MECHANICAL PROPERTIES min | |||
| Steel grade | Tensile strength Mpa | Yeild point or proof stress Mpa | Elongation % |
| STM-C-540 | 540 | - | 18 |
| STM-C-640 | 640 | - | 16 |
| STM-R-590 | 590 | 375 | 18 |
| STM-R-690 | 690 | 440 | 16 |
| STM-R-780 | 780 | 520 | 15 |
| STM-R-830 | 830 | 590 | 10 |
| Outside Diameter,wall Thickness and Mass (for casing Tube) | ||||
| Nominal diameter | Outside diameter mm | Inside diameter | Wall thickness mm | Unit mass kg/m |
| 43 | 43 | 37 | 3 | 2.96 |
| 53 | 53 | 47 | 3 | 3.7 |
| 63 | 63 | 57 | 3 | 4.44 |
| 73 | 73 | 67 | 3 | 5.18 |
| 83 | 83 | 77 | 3 | 5.92 |
| 97 | 97 | 90 | 3.5 | 8.07 |
| 112 | 112 | 105 | 3.5 | 9.36 |
| 127 | 127 | 118 | 4.5 | 13.6 |
| 142 | 142 | 133 | 4.5 | 15.3 |
| Outside Diameter,wall Thickness and Mass (for Core tube) | ||||
| Nominal diameter | Outside diameter mm | Inside diameter | Wall thickness mm | Unit mass kg/m |
| 34 | 34 | 26.5 | 3.75 | 2.8 |
| 44 | 44 | 34.5 | 4.75 | 4.6 |
| 54 | 54 | 44.5 | 4.75 | 5.77 |
| 64 | 64 | 54.5 | 4.75 | 6.94 |
| 74 | 74 | 64.5 | 4.75 | 8.11 |
| 84 | 84 | 74.5 | 4.75 | 9.28 |
| 99 | 99 | 88.5 | 5.25 | 12.1 |
| 114 | 114 | 103.5 | 5.25 | 14.1 |
| 129 | 129 | 118.5 | 5.25 | 16 |
| 144 | 144 | 133.5 | 5.25 | 18 |
| 180 | 180 | 168 | 6 | 25.7 |
| Outside Diameter,wall Thickness and Mass (for Drill Rod) | ||||
| Nominal diameter | Outside diameter mm | Inside diameter | Wall thickness mm | Unit mass kg/m |
| 33.5 | 33.5 | 23 | 5.25 | 3.66 |
| 40.5 | 40.5 | 31 | 4.75 | 4.19 |
| 42 | 42 | 32 | 5 | 4.56 |
| 50 | 40 | 37 | 6.5 | 6.97 |
