Comparison

POM (Delrin) vs ABS

A side-by-side comparison of Polyoxymethylene and Acrylonitrile Butadiene Styrene.

Property

POM (Delrin)

ABS

Physical

Density

1.41 g/cm³

1.04 – 1.07 g/cm³

Water Absorption (24h)

0.25 %

0.20 – 0.45 %

Transparency

Opaque

Shrinkage

1.8 – 2.5 %

0.4 – 0.9 %

Specific Gravity

—

1.05

Surface Finish

—

Matte to glossy

Mechanical

Young's Modulus

3.1 GPa

1.8 – 2.5 GPa

Tensile Strength

70 MPa

40 – 50 MPa

Flexural Strength

100 MPa

60 – 80 MPa

Impact Strength (Izod)

70 J/m

200 – 400 J/m

Elongation at Break

25 %

10 – 50 %

Hardness (Rockwell R)

—

100 – 115

Thermal

Melting Point

175 °C

Amorphous (no true Tm)

Continuous Service Temperature

100 °C

70 – 90 °C

Heat Deflection Temperature

110 °C

85 – 100 °C

Glass Transition Temperature

—

105 °C

Thermal Conductivity

—

0.17 W/m·K

CTE

—

80 – 100 × 10⁻⁶ /K

Electrical

Dielectric Constant

3.7

2.7 – 3.2

Volume Resistivity

10¹⁴ Ω·cm

10¹⁶ Ω·cm

Surface Resistivity

—

10¹⁵ Ω

Dielectric Strength

—

15 – 20 kV/mm

Chemical resistance

Acids

Poor

—

Bases

Excellent

Good

Solvents

Excellent

—

UV Resistance

Fair

Poor (unless stabilized)

Acids (dilute)

—

Good

Alcohols

—

Good

Oils & Greases

—

Fair

Gasoline

—

Poor

Acetone

—

Attacks / dissolves

Weathering

—

Poor without stabilizers

Sustainability

Recyclability

Recyclable

Recyclable (mechanical)

Recycling Code

7 (Other)

Carbon Footprint

~4 kg CO₂e / kg

~3.1 kg CO₂e / kg

Bio-based Content

—

0 %