TORICH INTERNATIONAL LIMITED
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ASTM A519 AISI4130 AISI4140 Seamless Alloy Steel Tubes
Size range: O.D.: 6-350mm W.T.:1-50mm L: according to customer requirement
Steel Grade and Chemical Compositions:
| Steel Grade and Chemical Compositions | |||||||
| C | Si | Mn | P≤ | S≤ | Cr | Mo | |
| 4130 | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | 0.040 | 0.040 | 0.80-1.10 | 0.15-0.25 |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | 0.040 | 0.040 | 0.80-1.10 | 0.15-0.25 |
Mechanical Properties:
| Mechanical Properties | |||||
| Grade | condition | Ultimat | Yield | Elongation | Rockwell |
| Strength | Strength | Hardness | |||
| ksi Mpa | ksi Mpa | % | B Scale | ||
| 4130 | HR | 90 621 | 70 483 | 20 | 89 |
| SR | 105 724 | 85 586 | 10 | 95 | |
| A | 75 517 | 55 379 | 30 | 81 | |
| N | 90 621 | 60 414 | 20 | 89 | |
| 4140 | HR | 120 855 | 90 310 | 15 | 100 |
| SR | 120 855 | 100 689 | 10 | 100 | |
| A | 80 552 | 60 414 | 25 | 85 | |
| N | 120 855 | 90 621 | 20 | 100 | |
Manufacture:
Tubes are made by seamless process.
At the manufacturer’s option, tubing may be furnished either hot finished or cold finished.
Workmanship, Finish, and Appeaerance:
The tubing shall be free of laps, cracks, seams, and other defects as is consistent with good commercial practice.
The surface finish will be compatible with the condition to which it is ordered.
Condition:
Sizing Methods:
1. Hot-Finished Mechanical Tubing
2. Cold-Worked Mechanical Tubing
3. Rough -Turned Mechanical Tubing
4. Ground Mechanical Tubing
Thermal Treatment:
1. A-Annealed
2. N-Normalized
3. QT-Quenched and Tempered
4. SR-Stress relieved or Finish Anneal
The tubes shall be pickled free of scale,. When bright annealing is used, pickling is not necessary.