TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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Grade and Chemical Composition ( ％ ) for alloy steel tube precision seamless steel tubes
| Grade | C | Mn | P≤ | S≤ | Si | Cr | Mo |
| 1008 | ≤ 0.10 | 0.30-0.50 | 0.040 | 0.050 | - | - | - |
| 1010 | 0.08-0.13 | 0.30-0.60 | 0.040 | 0.050 | - | - | - |
| 1018 | 0.15-0.20 | 0.60-0.90 | 0.040 | 0.050 | - | - | - |
| 1020 | 0.18-0.23 | 0.30-0.60 | 0.040 | 0.050 | - | - | - |
| 1025 | 0.22-0.28 | 0.30-0.60 | 0.040 | 0.050 | - | - | - |
| 1026 | 0.22-0.28 | 0.60-0.90 | 0.040 | 0.050 | - | - | - |
| 4130 | 0.28-0.33 | 0.40-0.60 | 0.040 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
| 4140 | 0.38-0.43 | 0.75-1.00 | 0.040 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 |
Mechanical properties for precision cold drawn steel tube
| Grade | Condition | Tensile Point (Mpa) | Yield Point (Mpa) | Elongation |
| 1020 | CW | ≥ 414 | ≥ 483 | ≥ 5% |
|
| SR | ≥ 345 | ≥ 448 | ≥ 10% |
|
| A | ≥ 193 | ≥ 331 | ≥ 30% |
|
| N | ≥ 234 | ≥ 379 | ≥ 22% |
| 1025 | CW | ≥ 448 | ≥ 517 | ≥ 5% |
|
| SR | ≥ 379 | ≥ 483 | ≥ 8% |
|
| A | ≥ 207 | ≥ 365 | ≥ 25% |
|
| N | ≥ 248 | ≥ 379 | ≥ 22% |
| 4130 | SR | ≥ 586 | ≥ 724 | ≥ 10% |
|
| A | ≥ 379 | ≥ 517 | ≥ 30% |
|
| N | ≥ 414 | ≥ 621 | ≥ 20% |
| 4140 | SR | ≥ 689 | ≥ 855 | ≥ 10% |
|
| A | ≥ 414 | ≥ 552 | ≥ 25% |
|
| N | ≥ 621 | ≥ 855 | ≥ 20% |
Cutting to Short pcs packing: