FDM PAHT-CF vs. Plastic PMMA

Compare FDM PAHT-CF vs. Plastic PMMA strength, stiffness, weight and thermal properties.

Plastic PMMABulk polymer (molded or machined)

Mechanical	FDM PAHT-CF	Plastic PMMA
Yield strength	not given (tensile used)	not given (tensile used)
Ultimate tensile strength	92MPa115% stronger	80MPa2
Compressive strength	not sourced	110MPa2
Flexural strength	125MPa1	115MPa2
Elongation at break	8.4%11.53x more ductile	5.5%2
Young's modulus (stiffness)	3.86GPa117% stiffer	3.3GPa2
Density	1,060kg/m³112% lighter	1,190kg/m³2
Strength to weight	86.8kN·m/kg29% higher	67.2kN·m/kg
Stiffness to weight	3.64MN·m/kg31% higher	2.77MN·m/kg
Poisson's ratio	not sourced	0.372
Shear modulus	not sourced	1.2GPa
Bulk modulus	not sourced	4.23GPa
Speed of sound	1,908m/s15% faster	1,665m/s

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal	FDM PAHT-CF	Plastic PMMA
Thermal conductivity	not sourced	0.19W/m·K2
Thermal expansion	not sourced	0-50 °C70µm/m·K2
100 mm part over a 50 °C swing	not sourced	350µm growth
Specific heat	not sourced	1,470J/kg·K2
Heats up and cools (diffusivity)	not sourced	0.109mm²/s
Thermal shock resistance	not sourced	41.5W/m
Melting point	225°C1	not sourced
Glass transition	70°C1	not sourced
Max service temperature	HDT 1.8 MPa170°C1	80°C2

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

Try it on a partA bracket to run stress or thermal on, free in your browser	Open in LessCAD	Open in LessCAD

Sources2 documents: Bambu Lab, Röhm

FDM PAHT-CF: Bambu Lab PAHT-CF, TDS V3.0, printed specimens X-Y, dry state; nozzle 290 °C, bed 100 °C, 100 mm/s, 100% infill; annealed and dried 80 °C for 12 h before testing.
Plastic PMMA: Röhm PLEXIGLAS GS 0F00 cast acrylic sheet, typical values at 23 °C / 50 % RH (Röhm Technical Information Ref. No. 211-1)

1
Bambu PAHT-CF Technical Data Sheet, V3.0Bambu LabFDM PAHT-CF · Ultimate tensile strength: typicalFDM PAHT-CF · Flexural strength: typicalFDM PAHT-CF · Elongation at break: typicalFDM PAHT-CF · Young's modulus (stiffness): typicalFDM PAHT-CF · Density: typicalFDM PAHT-CF · Melting point: typicalFDM PAHT-CF · Glass transition: typicalFDM PAHT-CF · Max service temperature: HDT 1.8 MPa
2
PLEXIGLAS GS and XT Technical Information (Ref. No. 211-1)Röhmarchived copyPlastic PMMA · Ultimate tensile strength: typical, 23 °CPlastic PMMA · Compressive strength: compressive yield stress, typicalPlastic PMMA · Flexural strength: typicalPlastic PMMA · Elongation at break: typicalPlastic PMMA · Young's modulus (stiffness): typical, short-termPlastic PMMA · Density: typicalPlastic PMMA · Poisson's ratio: typicalPlastic PMMA · Thermal conductivity: typicalPlastic PMMA · Thermal expansion: 0-50 °CPlastic PMMA · Specific heat: typicalPlastic PMMA · Max service temperature: max. permanent service temperature

Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

FDM PAHT-CF is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Mechanical

Is FDM PAHT-CF stronger than Plastic PMMA?

FDM PAHT-CF is stronger: its tensile strength is 92 MPa against 80 MPa for Plastic PMMA (15%).

Which is lighter, FDM PAHT-CF or Plastic PMMA?

FDM PAHT-CF is lighter: 1,060 kg/m³ against 1,190 kg/m³ for Plastic PMMA.

Which is stiffer, FDM PAHT-CF or Plastic PMMA?

FDM PAHT-CF is stiffer: Young's modulus 3.86 GPa against 3.3 GPa for Plastic PMMA, so the same part in FDM PAHT-CF deflects less under the same load.

Which is lighter for the same job, FDM PAHT-CF or Plastic PMMA?

For the same stiffness or strength: FDM PAHT-CF is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.

Part that must be	FDM PAHT-CF	Plastic PMMA
Stiff rod or tie (tension)	lighter	31% heavier
Stiff beam (bending)	lighter	21% heavier
Stiff panel or plate	lighter	18% heavier
Strong rod or tie	lighter	29% heavier
Strong beam	lighter	23% heavier
Strong panel or plate	lighter	20% heavier

For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).

Which is more ductile, FDM PAHT-CF or Plastic PMMA?

FDM PAHT-CF stretches further before it breaks: 8.4% elongation at break against 5.5% for Plastic PMMA.