Fortu Tech specializes in manufacturing Nb 521 (Nb-5W-2Mo-1Zr) products.
| Nb 521 alloys Regular Product Nb-5W-2Mo-1Zr alloys | ||
| Nb 521 Foil | Nb 521 Wire | Nb 521 Sheet |
| Nb 521 Rod | Nb 521 Targets | Nb 521 Tube |
| Nb 521 Pellet | Nb 521 Fasteners | Nb 521 Ingot |
When temperature is in range of 1100 ~ 1650℃, Niobium tungsten alloy (NB521) has higher strength, good welding performance when normal metal. Because Nb-5W-2Mo-1Zr alloys has good room temperature plasticity, it can be made into thin sheets and complex parts easily.
Niobium tungsten alloy (Nb-5W-2Mo-1Zr) is widely used in liquid rocket engine due to its excellent high temperature performance.
NB521 can completely meet the high temperature performance requirements of engine fuselage.
| Chemical Requirements Nb 521 / Nb-5W-2Mo-1Zr alloys | |||
| Element | W | Mo | Zr |
| Content Maximum % | 4.7~5.5 | 1.7-2.5 | 0.7-1.2 |
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| Mechanical Properties of Nb521 alloy sheet in high temperature | ||
| Temperature | σb´ | σp0.2´ |
| 1450°C | 134 MPa | 128 MPa |
| 1500°C | 113 MPa | 108 MPa |
| 1550°C | 109 MPa | 104 MPa |
| 1600°C | 93 MPa | 81 MPa |
| 1700°C | 80 MPa | 74 MPa |
| 1800°C | 65 MPa | 59 MPa |
| Mechanical Properties of Nb521 alloy rod in high temperature | ||
| Temperature | σb´ | σp0.2´ |
| 1450°C | 157 MPa | 130 MPa |
| 1500°C | 135 MPa | 119 MPa |
| 1550°C | 110 MPa | 110 MPa |
| 1600°C | 100 MPa | 85 MPa |
| 1700°C | 83 MPa | 75 MPa |
| 1800°C | 63 MPa | 60 MPa |
The low-carbon niobium tungsten alloy is normally purified by vacuum electron beam melting, and then homogenized by vacuum consumable arc melting.
This method of preparing Nb 521 alloys ingot can not only homogenize the main alloy elements W, Mo and Zr, but also make the content of oxygen meet the demands.
| Smelting Nb 521/ Nb-5W-2Mo-1Zr alloys | ||
| Drawing Rate | Smelting Power | Smelting Vacuum max |
| 1～2mm/min | 240kW～580kW | 1.0×10-2Pa |
In aerospace applications, Nb-5W-2Mo-1Zr is mainly used as a high specific impulse, multiple start-up, thrust adjustable two-component liquid rocket engine.
Nb521 can be used as thermal protection material and structural material when used in hypersonic aircraft, space vehicle, satellite, missile and hypersonic low altitude rocket.
Add: 399 Chunhe Road, Baoshan District, Shanghai, China, 200941
Tel: +86 21 56656030
Email: info@fortu-tech.com
