Menu (ESC)

Acetal Homopolymer (POM-H)

POM-H is a thermoplastic, further classified as a polyoxymethylene plastic.

The properties of POM-H include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare POM-H to: polyoxymethylene plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elongation at Break

7.0 to 55 %

Flexural Modulus

2.9 to 4.3 GPa 0.42 to 0.62 x 106 psi

Impact Strength: Notched Izod

40 to 75 J/m 0.75 to 1.4 ft-lb/in

Tensile Strength: Ultimate (UTS)

60 to 67 MPa 8.7 to 9.7 x 103 psi

Other Material Properties


1.4 to 1.6 g/cm3 89 to 97 lb/ft3

Specific Heat Capacity

1250 to 1460 J/kg-K 0.3 to 0.35 BTU/lb-°F

Common Calculations

Strength to Weight: Axial

11 to 13 points

Strength to Weight: Bending

22 to 26 points

Followup Questions

Further Reading

Reinforced Plastics Durability, Geoffrey Pritchard (editor), 1999

SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000

Modern Plastics Handbook, Charles A. Harper (editor), 1999

Plastics Materials, 7th ed., J. A. Brydson, 1999

CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015