Delrin® Acetal Homopolymer
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Delrin® Acetal Homopolymer (Polyoxymethylene) is a semi-crystalline thermoplastic engineering material with high strength and rigidity, excellent machinability and varied applications.
Key Features:
- Strong and rigid
- Tough
- Good sliding properties
- Resistant to dilute acids, cleaning agents and numerous solvents
- Very good electrical insulation
- Easily machined and polished
- Not resistant long term to water over 60°C
- Easily welded
Temperature Range:
-40ºC to +100ºC, +150ºC short term.
Applications:
Friction bearings, gears, spring elements, housing parts, rollers, friction strips, plugs, insulators, snap fit connectors and seals.
Availability:
| Colour: |
Natural (white) or black. |
| Sheet Size (mm): |
3000 x 500, 1220 x 610. |
| Thickness (mm): |
5 to 100. |
| Rod dia (mm): |
4 to 200. |
| Length (mm): |
3000. |
Technical Information:
Information to be used as a guide only. It corresponds with our current knowledge and indicates possible applications. We cannot guarantee suitability for a specific application. Unless otherwise stated these values represent averages taken from injection moulded samples.
| Properties |
Unit |
Test Method DIN ASTM |
Result |
| Mechanical |
- |
- |
- |
| Density |
g/cm³ |
53479 |
1.42 |
| Tensile strength at yield |
MPa |
53455 |
70 |
| Tensile strength at break |
MPa |
53455 |
- |
| Elongation at Break |
% |
53455 |
40 |
| Modulus of elasticity in tension |
MPa |
53457 |
3300 |
| Modulus of elasticity in flexure |
MPa |
53457 |
2620 |
| Ball indentation hardness |
MPa |
53456 |
170 |
| Impact strength (Charpy) |
KJ/m² |
53453 |
no break |
| Creep rupture strength after 1000 hours with static load |
MPa |
- |
40 |
| Time yield limit for 1% elongation after 1000 hours |
MPa |
- |
13 |
| Coefficient of friction against hardened and ground steel p+0,05 N/mm2, v=0,6 m/s |
- |
- |
0.34 |
| Wear conditions as above |
µm/km |
- |
4.6 |
| Thermal |
- |
- |
- |
| Crystalline melting point |
ºC |
53736 |
175 |
| Glass transition temperature |
ºC |
53736 |
-38 |
| Heat distortion temperature method A |
ºC |
ISO 75 |
124 |
| Heat distortion temperature method B |
ºC |
ISO 75 |
170 |
| Max. service temperature short term |
ºC |
- |
150 |
| Max. service temperature long term |
ºC |
- |
100 |
| Coefficient of thermal conductivity |
W/(m K) |
- |
0.31 |
| Specific heat |
J/(g K) |
- |
1.5 |
| Coefficient of thermal expansion |
10-5/K |
- |
10 |
| Electrical |
- |
- |
- |
| Dielectric constant at 10 (5) Hz |
- |
53483 |
3.7 |
| Dielectric loss factor at 10(5) Hz |
- |
53483 |
0.005 |
| Specific Volume Resistance |
Ωcm |
53482 |
10 (15) |
| Surface Resistance |
O |
53482 |
- |
| Dielectric strength 1mm |
kV/mm |
53481 |
>50 |
| Tracking resistance |
- |
53480 |
KA 3c |
| Miscellaneous |
- |
- |
- |
| Moisture Absorption: Equilibrium in standard atmosphere (23ºC / 50% relative humidity) |
% |
53714 |
0.3 |
| Water absorption at saturation at 23ºC |
% |
53495 |
0.5 |
| Resistance to hot water, washing soda |
- |
- |
Not resistant |
| Flamability |
- |
UL 94 |
HB |
| Resistance to weathering |
- |
- |
Not resistant |
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