Dimensional Tolerance Range of OD |
OD |
WT | Siding | Out of Round | Bow/1220mm | ≤6mm | ±2.0% | ±10% | 12% | 2.0% | 2.5mm | 6.00-15.00mm | ±1.25% | ±8% | 10% | 1.5% | 2.5mm | 15.00-20.00mm | ±1.25% | ±10% | 15% | 1.5% | 2.5mm | 20.00-25.00mm | ±1.25% | ±10% | 15% | 1.5% | 3.0mm | 25.00-30.00mm | ±1.35% | ±12% | 15% | 1.5% | 3.0mm |
Chemical composition (ppm) Cr | Ge | Fe | Mg | T i | Ca | Al | Na | Li | K | OH | <0.5 | <0.4 | 1.5 | 0.5 | 2.5 | 2.3 | 2.5 | 2.5 | 036 | 2.5 | 1—50 |
Physical Properties Density 20℃ kg*m-3(×103) | 2.2 | Coefficient of expansion 25-300℃ ℃-1(×10-6) | 0.58 | Softening point（℃） | 1620 | Annealing point（℃） | 1160 | Strain point(℃) | 1060 | Youngs modulus(Pa) | 7.3×105 |
Spectral Transmission at 1.0mm thickness Nm | <220 | 230-280 | 290-330 | 315 | 350 | 380 | 590 | 780 |
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