Introduction
The melting point of niobium is 2468 ℃, and the density of it is 8.6 g/cm3. With the characteristics of corrosion resistance, high temperature resistance and malleability, niobium is widely used in electronics industry, steel industry, chemical industry, optics, gemstone manufacturing, superconducting technology, aerospace. technology and other fields. Niobium sheet and Niobium tubes /pipe is the most common form of Nb product.
Specification
Material: Pure niobium
UNS No.: R04200, R04210
Size: OD: 1.0-150mm, WT: 0.1-5.0mm, Length: 10mm-8000mm
Standard: ASTM B394
Purity: ≥99.95%, 99.995%
Chemical composition
| Composition% | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Main Content | Impurities (no more than %) | ||||||||||
| Nb | Fe | Si | Ni | W | Mo | Ti | Ta | O | C | H | N | |
| RO4200 | Remaining | 0.004 | 0.004 | 0.002 | 0.005 | 0.005 | 0.002 | 0.05 | 0.012 | 0.0035 | 0.0012 | 0.003 |
| RO4210 | Remaining | 0.01 | 0.01 | 0.005 | 0.02 | 0.01 | 0.004 | 0.07 | 0.015 | 0.0050 | 0.0015 | 0.005 |
Manufacture process of niobium tube/Pipe
For the manufacture process: First, melt the not forging niobium bar into niobium ingot by vacuum electron beam melting technology. There are two ways of smelting, single smelting and multiple smelting. Usually we smelt two times, or it can be more than two times depending on the product specific requirements. Second, forging and axial breakdown niobium ingot and then make it into niobium tube bloom by extrusion process manufacturing, then take it for annealing treatment and cleaning. After several times of rolling and annealing finally get the high quality niobium tube. The performance of this kind of technology is uniform, mainly used to produce small specification pipe and capillary materials, applicable to the production of various specifications of products.
Niobium tubes welding is selects high quality, appropriate size of niobium sheet roll, welding, and then the joint treatment on welds, finally the whole round handle, make suitable size of niobium tube.This process of niobium tube wall thickness, the inner surface of good quality and high production efficiency, cost is lower, the most important thing is that can produce large diameter of niobium tube.
We provide seamless tube, welded tube & pipe, and niobium capillary tube. Other niobium tubular products such as niobium ring are also available on request.
Testing
Chemical composition test
Mechanical properties test
Hydrostatic test
Ultrasonic flaw detection
Eddy current test
Application
Used for the heat exchange tube.
The protect tube of thermometer in petrochemical industry.
The electronics industry.
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