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POM-H
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- Very good mechanical properties
- Very good stiffness, hardness and creep resistance
- Low coefficient of linear thermal expansion
- Colours: white / black
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Semi-finished products made of virgin acetal homopolymer (POM-H).
It has better mechanical properties, stiffness, hardness and creep resistance, as well as a lower coefficient of thermal linear expansion than POM-C, and it often shows enhanced wear resistance.
It is physiologically inert and suitable for machining in automatic lathes; it is recommended for the manufacture of precision parts.
| Properties | ISO standard | Unit of measurement | Value |
| General properties | |||
| Colour | natural / black | ||
| Density (specific weight) | 1183 | g/cm3 | 1.43 |
| Water absorption | 62 | % | 0.2 |
| Mechanical properties | |||
| Tensile strain at break | 527 | % | 25 |
| Tensile strain at yield | 527 | MPa | 78 |
| Tensile modulus of elasticity | 527 | MPa | 3700 |
| Impact strength | 178/1eA | kJ/m2 | 10 |
| (Charpy impact test - notched) | |||
| Hardness | 53505 | Scale D | 83 |
| Thermal properties | |||
| Melting temperature | 11357 | °C | 180 |
| Thermal conductivity | 52612 | W/mK | 0.31 |
| Coefficient of linear thermal expansion | av. value between 20 °C and 60 °C | m/mK | 95x10-6 |
| Working temperature, continuously | -- | °C | -0.47619048 |
| Working temperature, for short periods | -- | °C | 150 |
| Flammability | UL94 | -- | HB/HB |
| Electric properties | |||
| Dielectric strength | 60243 | kV/mm | 20 |
| Volume resistivity | 60093 | Ohm/cm | >1014 |
| Surface resistivity | 60093 | Ohm | >1014 |
| Physiological properties | |||
| Suitable for contact with foodstuffs | 21CFR (FDA) | -- | No |
Although the information provided in this product data sheet is confirmed by reliable research, POLITECNICA CETAI shall not take any responsibility for the application, processing or use of such information.
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