TU 48-19-309-79. Wire made of thoriated tungsten. Technical conditions.
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Scope of application TU 48−19−309−79
This standard regulates the general requirements for the production of drawn wire from thoriated tungsten obtained by the powder metallurgy method used in the manufacture of electronic devices. Finished products must meet mechanical requirements, including tensile strength, yield strength, elongation, etc. Chemical analysis, tensile tests and hardness tests must be carried out in accordance with relevant standards.
Bibliography
| Type of standard | Standards for products (services) |
| Date of implementation | 07/01/1979 year |
| Approved by | Interstate Council for Standardization, Metrology and Certification |
| Original language | Russian |
| Title in English | Production of drawn wire from thoriated tungsten. Technical specifications |
| Code CHS |
B74 |
| Number of pages | thirty |
Wire dimensions and limit deviations
| Make | Diameter, mkm | Appointment |
|---|---|---|
| VM | from 18.5 to 1500 | The parts of the instruments operating at a temperature of no higher than 2100 ° C under conditions of increased mechanical loads (shocks, vibrations). |
| VT-7 | from 25 to 1500 | Hooks, springs, and also cathodes of some electric and gas-discharge devices. |
| VT-10 | from 25 to 1500 | Cathodes of electronic and gas-discharge devices. |
| VT-15 | from 150 to 1500 | — || - |
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