Recrystallisation & hot strength
Metallurgical condition as supplied Required by the standard
| Form | Available condition |
|---|---|
| Plate | Hot-rolled; or hot-rolled, stress-relieved |
| Sheet | Hot-rolled; hot-rolled stress-relieved; cold-rolled; cold-rolled stress-relieved |
| Foil | Cold-rolled; or cold-rolled, stress-relieved |
Plate, sheet and foil have no default condition: the condition must be designated on the purchase order. Note "as designated": this specification has no default condition, so if the order is silent nothing is agreed and each item has to be called out. That is the opposite of molybdenum, where silence means stress-relieved — two refractory metals with opposite default rules, so do not carry the habit across.
The available conditions narrow with the product form: plate has no cold-rolled option (heavy sections cannot be cold-rolled) and foil has no hot-rolled option. Check the form before choosing a condition.
Other conditions may be agreed between purchaser and manufacturer.
⚠ No recrystallisation temperature is specified, and there is no reheat thermal-stability test of the kind used for molybdenum. The recrystallisation temperature of tungsten has to come from manufacturer data or a separate test.
Chemical composition
Nominal: elements given only as a maximum are counted at the cap; the balance takes the remainder.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements1 element | |||
| W | Tungsten | Bal. | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual6 elements | |||
| C | Carbon | ≤ 0.01% | |
| O | Oxygen | ≤ 0.01% | |
| N | Nitrogen | ≤ 0.01% | |
| Fe | Iron | ≤ 0.01% | |
| Ni | Nickel | ≤ 0.01% | |
| Si | Silicon | ≤ 0.01% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % |
|---|---|---|---|---|
| Plate | Hot rolled, or hot rolled and stress relieved | — | — | — |
| Sheet | Hot rolled, hot rolled and stress relieved, cold rolled, or cold rolled and stress relieved | — | — | — |
| Foil | Cold rolled, or cold rolled and stress relieved | — | — | — |
Where this grade is recommended
Matched in 15 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Sapphire growth crucibles | Solar & Glass | ~2050 °C | 1 / 4 | 95 |
| Vacuum hot zone & hot dies | Furnaces & Vacuum | > 1400 °C | 1 / 6 | 92 |
| Imaging equipment & targets | Medical Devices | In-body (37 °C) | 1 / 5 | 92 |
| HT boats & fixtures | Semiconductor & Vac-Electronics | 1200 – 1600 °C | 1 / 5 | 92 |
| Sputtering targets | Semiconductor & Vac-Electronics | Ambient | 2 / 6 | 92 |
| Heat shields & reflectors | Furnaces & Vacuum | > 1400 °C | 1 / 5 | 90 |
| CZ hot zone (Si) | Solar & Glass | > 1600 °C | 1 / 4 | 90 |
| Heating elements & electrodes | Furnaces & Vacuum | 1400 – 1800 °C | 2 / 7 | 90 |
| Sintering boats & setters | Furnaces & Vacuum | > 1350 °C | 1 / 5 | 88 |
| Crucibles & moulds | Furnaces & Vacuum | > 1500 °C | 2 / 5 | 88 |
| Vacuum electronics | Semiconductor & Vac-Electronics | 400 – 900 °C | 2 / 8 | 88 |
| Heaters & susceptors | Semiconductor & Vac-Electronics | 500 – 900 °C | 2 / 4 | 88 |
Top 12 by score shown; 3 more matched conditions — browse them by industry in the selector. Open the selector →
Designations & equivalents
| Trade name(s) | Pure Tungsten W1 |
| ASTM / AISI | ASTM B760 |
| GOST (Russia) | ≈ ВЧ |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
Name the standard and its edition on the order.
Frequently asked questions
What is Pure Tungsten W1?
Pure Tungsten W1 — Tungsten. Sintered pure tungsten — extreme-temperature parts, counterweights and targets
What is the maximum service temperature of W1?
Typically about 1700 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
Which standards cover W1?
ASTM B760-07
Where is W1 typically used?
Sapphire growth crucibles (Solar & Glass); Vacuum hot zone & hot dies (Furnaces & Vacuum); Imaging equipment & targets (Medical Devices); HT boats & fixtures (Semiconductor & Vac-Electronics)
In which forms is W1 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
Or email us: info@kochlin.com