Tu 11-77 (Ya0.021.056 TU). Tungsten rods. Technical conditions.
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TU 11−77 (Hoe0.021.056). Percent composition
The chemical composition of products, depending on the grade of tungsten, must meet the following requirements.
| Brand of tungsten | Content of tungsten (+ thorium oxide), min | Sum of impurities, no more than | Thorium oxide |
|---|---|---|---|
| VA | 99.95 | 0.05 | - |
| VRN | 99.90 | 0.10 | - |
| VT-7 | 99.95 | 0.05 | 0.7−1.0 |
| VT-10 | 99.95 | 0.05 | 1.0−1.5 |
| VT-15 | 99.95 | 0.05 | 1.5−2.0 |
| VT-30 | 99.94 | 0.06 | 2.5−3.5 |
| VT-50 | 99.94 | 0.06 | 4.5−5.5 |
The amount of impurities includes the following elements: iron, calcium, molybdenum, potassium, silicon, aluminum. Supplier Avlob offers to buy tungsten rolled products at a bargain price. The price is the best in this segment of rental.
Assortment
| Diameter | Tolerance | Length, mm, min | Delivery status |
|---|---|---|---|
| 1.0−1.9 through 0.1 | ± 2.0 | 1000 | drawn |
| 2.0−2.4 through 0.2 | 600 | drawn | |
| 2.6−4.8 through 0.2 | 600 | forged | |
| 5,0−12,0 through 0,5 | 300 | forged |
1.4. The color of the drawn rods according to Tu 11−77 (Яе0.021.056) should be from black to dark gray. The colors of tarnishing are allowed. On the surface of the forged bars, oxidation is allowed.
1.5. The bars should be without shells, cracks, stratifications, large burrs and strokes. Small strokes, burrs, traces of forging or straightening within the tolerance for diameter, as well as single large burrs on bars of VT-50 and VRN grades are allowed.
1.6. The ends of the rods must be cut evenly. Minor chips are allowed.
1.7. The bars must be straight. The deflection should not exceed 1% of the measured length of the rod. Upon agreement with the customer, delivery of unbent drawn rods is allowed.
Storage
In closed warehouses or under a canopy, where adequate protection against mechanical and other damages is provided.
Delivery, price
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