21% Lead Glass Tube
21% Lead glass tubing has the following properties:
Chemical & Physical Property:
Coefficient of Expansion (20-300 degree ): 91.0± 2× 10-7/K
Softening Point: 635± 10 degree
When the Mass resistance is 100MΩ . Cm, temperature of TK-100: ≥ 240degree
Density: 2.85± 0.03 g/cm3
Strain Point: 440.00 degree
Annealing Point: 470.00 degree
Working Point: 1010.00 degree
Melting Point: 1480.00 degree
Content of Lead: 21%
Main composition
SiO2 62.5 %
Na2O+ K2O 14%
Al2O3 1.5%
PbO 21%
BaO+SrO
B2O3
Others 1%
Application:
Lead glass tube can be used for high-grade core neon bulb, automotive bulbs, neon tubes and energy saving wick pillar products. Also be used for pulling bubble tubes, test tubes, pipes and other crafts. The company's product quality, by testing, in line with national standards. Specifications of products according to customer needs.
Specification:
O. D. ToleranceRoundnessDToleranceWall toleranceLStraightness
6.0<D<10.0± 0.2<0.20.8± 0.05<0.101000<2
10.0<D<12.01.0
12.0<D<15.0
15.0<D<18.0± 0.31.2± 0.06
18.0<D<20.0± 0.351.3± 0.08
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