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flat panel heater glass Property | Certificate owned | SPF certificate,CE certificate |
| Thickness(mm) | 3.2±0.2 | |
| Dimension(mm) | on required | |
| Dimension Tolerance(mm) | ±1.0 | |
| Surface Condition | Structured in same way on both sides acc. To technical requirement | |
| Solar transmittance | 91.6% | |
| Iron Content | 150ppm | |
| Poisson's ratio | 0.2 | |
| Density | 2.5g/cc | |
| Young's Modulus | 73GPa | |
| Tensile strength | 90N/mm2 | |
| Compressive Strength | 700-900N/mm2 | |
| Expansion coefficient | 9.03 x 10-6/ | |
| Softening point() | 720 | |
| Annealing point() | 550 | |
| Strain point() | 500 |
flat heater glass