Niobium tubes
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Description
1. Introduction to niobium tubes
- Grade number: R04200, R04210
- Purity: ≥99.95%, 99.99%
- Standard: ASTM B394
- Density: 8.57g/cm 3
- Status: hard, semi-hard, soft
2. Application field of niobium tubes
Used for heat exchanger tubes in heat exchangers. Thermometer protection tube in the petrochemical industry. Corrosion-resistant, high temperature resistant industry, aerospace, electronics industry.
Third, chemical ingredients
| Chemical Constituents (%) | ||||||||||||
| Brand number | Main elements | Impurity content (≤) | ||||||||||
| Nb | Fe | And | In | W | Mo | Of | Facing | O | C | H | N | |
| Nb1 | Bal | 0.004 | 0.004 | 0.002 | 0.005 | 0.005 | 0.002 | 0.05 | 0.012 | 0.0035 | 0.0012 | 0.003 |
| Nb2 | Bal | 0.01 | 0.01 | 0.005 | 0.02 | 0.01 | 0.004 | 0.07 | 0.015 | 0.0050 | 0.0015 | 0.008 |
4. Mechanical properties
| Brand number | Minimum tensile strength (MPa) | Minimum yield strength (MPa)
(0.2% residual deformation) |
Minimum elongation (%)
(25.4mm metering) |
| R04200，R04210
Nb1，Nb2 |
125 | 85 | 25 |
V. Tolerance of niobium tube (mm )
| Outer diameter | Outer diameter tolerance | Wall thickness tolerance |
| 1~20 | 0.01 | ±5% |
| 20~25 | 0.05 | ±5% |
| 25~40 | 0.10 | ±5% |
| 40~60 | 0.15 | ±5% |
| 60~80 | 0.20 | ±5% |
| 80~150 | 0.25 | ±5% |
