That 48-19-320-91. Rods tungsten electrodes for xenon lamps. Specifications.
1. Technical requirements Tu 48−19−320−91
1.1. Rod tungsten electrodes for xenon lamps must comply with the requirements of this specification.
1.2. Bars should be combined, i.e. having a Central part of coarse grain tungsten grades W-50 or BT-15 and a coating of pure tungsten.
1.2.1. The chemical composition of the Central part of the rod brand BT15 and ВТ50 should match THAT 48−19−59−87.
1.3. Dimensions and limit deviations must meet the following requirements.
|The diameter of the outer||Pred. deviation., mm||The length of the Central part||Pred. deviation., mm||Length, mm, not less|
- Each party is allowed up to 20% of bars with a length of more than 60% of nominal.
- The reduction of the outer diameter to 9.75, and 10.0, 12.0 and 13.5 cm, 14.5 mm, respectively, at the ends of the rods at a distance of not more than 30 mm from the ends of rejection is not a sign.
1.5. Bars must be straight. The deviation from straightness shall not exceed 1% of the measured length of the rod.
1.6. The degree of compression of the Central part of the rod shall be not less than 60%.
1.7. The density of bars should be not less than 18.2 g/cm3
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