Low-friction, dimensionally stable engineering plastic — precision parts, gears, bushes, manifolds.
| Property | Typical value |
|---|---|
| Density | 1410 kg/m³ |
| Yield | ~65 MPa (typical) |
| Tensile | 65–75 MPa |
| Elongation | ~25–40 % |
| Young's E | 2.8–3.2 GPa |
| Hardness | ~80 Shore D |
| CTE | ~110 µm/m·K |
| Thermal cond. | ~0.31 W/m·K |
| Max service | ~90–100 °C |
| Poisson ν | ~0.35 |
| Shear modulus G | ~1.1 GPa (derived) |
| Shear strength | ~66 MPa (POM-H/Delrin published; POM-C slightly lower) |
| Specific heat | ~1460 J/kg·K |
| Melting point (Tm) | ~166 °C (POM-C); ~175 °C (POM-H) |
Best-machining plastic — crisp chip, tight tolerances, superb finish. Low moisture uptake.
Difficult to bond/weld (low surface energy). Mechanical fixing.
| System | Designation |
|---|---|
| EN | ISO 1043-1 "POM"; ISO 9988 |
| DIN | DIN 7728 POM |
| ASTM | D6778 (POM) |
Equivalents & alternatives: POM-C (copolymer, general); POM-H = Delrin (homopolymer, higher strength/creep). Alt: nylon (tougher), PET.
Tough, wear-resistant nylon — gears, rollers, wear pads, bushes. Cast grade for larger sections.
Engineering plasticChemically inert, very low friction, wide temperature range — seals, slides, insulators, chem parts.
Engineering plasticUltra-high wear + impact resistance, self-lubricating — wear strips, guides, chute liners, star wheels.
Engineering plasticTransparent and extremely impact-resistant — machine guards, glazing, light covers. Scratches unless hard-coated; attacked by solvents.
