Tu 48-21-686-80. Wire made of chromel alloy T, alumel and copel for sensitive elements of highly stable thermocouples. Technical conditions.
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Scope of application GOST 1791−67
This specification regulates the general requirements for the production of chromel-T, alumel, and copel wires for sensitive elements of highly stable thermocouples. 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.
| Brand alloy | Wire Ø, mm | Limit deviations in diameter, mm |
|---|---|---|
| Chromel T | 0.5 | -0.05 |
| 0.7 | -0.05 | |
| 1.2 | -0.06 | |
| 1.5 | -0.08 | |
| 3.2 | -0.10 | |
| Aljumel | 0.5 | -0.05 |
| 0.7 | -0.05 | |
| 1.2 | -0.06 | |
| 1.5 | -0.08 | |
| 3.2 | -0.10 | |
| Kopel | 0.5 | -0.05 |
| 0.7 | -0.05 | |
| 1.2 | -0.06 | |
| 1.5 | -0.08 | |
| 3.2 | -0.10 |
The ovality of the wire should not exceed the limit deviation in diameter.
Storage
In closed warehouses or under a canopy, where adequate protection against mechanical and other damages is provided.
Delivery, price
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