Thermoplastics - Physical Properties
Physical properties of some common thermoplastics as ABS, PVC, CPVC, PE, PEX, PB and PVDF
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Typical values of some common thermoplastics can be found in the table below.
| Thermoplastic | Specific Gravity | Tensile Yield Strength (103 psi) |
Tensile
Modulus (103 psi) |
Coefficients of Linear Expansion (106 in/in oF) |
Thermal
Conductivity (Btu in /h ft2 oF) |
Specific
Heat (Btu/lb oF) |
Maximum Temperature Limit (oF/oC) |
| ABS | 1.08 | 7.0 | 340 | 60 | 1.35 | 0.34 | 180/80 |
| PVC | 1.4 | 8.0 | 410 | 30 | 1.1 | 0.25 | 150/65 |
| CPVS | 1.54 | 8.0 | 420 | 35 | 1.0 | 0.20 | 210/100 |
| PE | 0.95 | 3.2 | 120 | 90 | 3.2 | 0.55 | 160/70 |
| PEX | 0.94 | 2.8 | . | 90 | 3.2 | 0.55 | 210/100 |
| PB | 0.92 | 4.2 | 55 | 72 | 1.5 | 0.45 | 210/100 |
| PVDF | 1.76 | 7.0 | 220 | 70 | 1.5 | 0.29 | 300/150 |
- 1 psi (lb/in2) = 6,894.8 Pa (N/m2) - Note! You can use the pressure unit converter on this page to switch to Pa (N/m2) units.
- 1 (Btu/lb oF) = 4,186.8 (J/kg K) = 1 (kcal/kg oC)
Tensile Yield Strength
Tensile yield strength is the maximum engineering stress in psi (or Pa) at which a permanent non-elastic deformation of the thermoplastic material begins.
Yield Point
Yield point is the first point where the specimen yields, where the specimen's cross-sectional area begins to contract significantly, or where the strain can increase without increase in the stress.
Ultimate Tensile Strength
Ultimate tensile strength is the maximum stress the thermoplastic material can withstand before failing, whichever occurs at the higher stress level.
Tensile Modulus
Tensile modulus or Young's Modulus is the ratio of stress to strain within the elastic region of the stress-strain curve before the yield point.
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