POM (polioksymetylen)
POM is very resistant to abrasion and chemicals. It has good sliding properties, high impact strength, high durability, surface hardness, stiffness. POM is a very strong material with a minimal water absorption, very good workability, dimensional stability, fine chips, etc.
APPLICATION FIELDS: in installation construction, in boat construction, in construction of chemical installations, in machine construction, as gear elements, slide bearing parts, rolling bearing housings, roller bearing housings, gear wheels, pump elements, etc.
| Properties | Unit | Value |
| General properties | ||
| Density | g/cm3 | 1,41 |
| Moisture absorption, saturation 23°C | % | 0,25 |
| Water absorption, saturation | % | 1,8 |
| Mechanical properties | ||
| Yield stress | N/mm2 | 70 |
| Elongation at break (yieldpoint) | % | 40 |
| Modulus of longitudinal elasticity, tension | N/mm2 | 3000 |
| Ball indentation hardness, 30 sec. value H 961/30 | N/mm2 | 150 |
| Notched impact strength | kJ/m2 | without friction |
| Notched impact strength (Charpy) | kJ/m2 | 9 |
| Stress in time unit (1% 1000h) | N/mm2 | 14 |
| Electrical properties | ||
| Volume resistivity | Ohm cm | 10Exp15 |
| Dielectric constant | 10E x p6 Hz | 3,8 |
| Dielectric loss factor | 10E x p6 Hz | 0,003 |
| Dielectric strength | kV/mm | 50 |
| Surface resistance | Ohm | 10Exp13 |
| Thermal properties | ||
| Max. temperature for using (short-term) | °C | 150 |
| Max. temperature for using (long-term) | °C | 115 |
| Resistance to heat distortion A (ISO-R 75) | °C | 110 |
| Resistance to heat distortion B (ISO-R 75) | °C | 160 |
| Coefficient of linear expansion between 23-100°C | 10Exp E5x1/K | 11 |
| Thermal conductivity at 23°C | W/Km | 0,31 |
| Flammability according to UL standard 94 | HB | |
| Melting point | °C | 165 |