Delrin is the precision engineering choice with superior dimensional stability, low friction, and chemical resistance. ABS is the economical option for prototypes and parts where dimensional precision is less critical.
| Property | Delrin (POM / Acetal) | ABS (Acrylonitrile Butadiene Styrene) |
|---|---|---|
| Tensile Strength | 70 MPa (10.2 ksi) | 44 MPa (6.4 ksi) |
| Yield Strength | 65 MPa (9.4 ksi) | 43 MPa (6.2 ksi) |
| Hardness | Rockwell M80 | Rockwell R105 |
| Density | 1.42 g/cm³ | 1.05 g/cm³ |
| Machinability Rating | 85/100 | 82/100 |
| Thermal Conductivity | 0.31 W/m·K | 0.17 W/m·K |
| Melting Point | 175 °C | 200–260 °C (processing range) |
| Tolerance | ±0.02 mm | ±0.05 mm |
| Property | Delrin (POM / Acetal) | ABS (Acrylonitrile Butadiene Styrene) | Winner |
|---|---|---|---|
| Dimensional Stability | Excellent | Good | Delrin |
| Friction Coefficient | 0.20-0.35 | 0.40-0.50 | Delrin |
| Tensile Strength | 70 MPa | 44 MPa | Delrin |
| Cost | ~$5-10/kg | ~$3/kg | ABS |
| Machinability | 85/100 | 82/100 | Delrin |
| Paintability | Poor | Excellent | ABS |
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