Borosilicate Glass (Pyrex 7740) vs E-Glass Fiber (neat)
Property comparison of Borosilicate Glass (Pyrex 7740) and E-Glass Fiber (neat), both glass.
| Property | Borosilicate Glass (Pyrex 7740) | E-Glass Fiber (neat) | Difference |
|---|---|---|---|
| Elastic modulus | 64,000 MPa | 72,400 MPa | +13% |
| Shear modulus | 27,000 MPa | 30,000 MPa | +11% |
| Poisson ratio | 0.2 | 0.22 | +10% |
| Density | 2,230 kg/m³ | 2,540 kg/m³ | +14% |
| Thermal conductivity | 1.2 W/m·K | 1 W/m·K | -17% |
| Specific heat | 830 J/kg·K | 810 J/kg·K | -2% |
| Coefficient of thermal expansion | 0.000003 1/K | 0.000005 1/K | +52% |
Difference is E-Glass Fiber (neat) relative to Borosilicate Glass (Pyrex 7740). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- ASTM
- standard
- ASTM D578
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