Brass C360 vs. Plastic PPS GF40

Compare Brass C360 vs. Plastic PPS GF40 strength, stiffness, weight and thermal properties.

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Plastic PPS GF40Bulk polymer (molded or machined)

Mechanical
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Yield strength	310MPasourcetypical, 0.5% extension under load	not given (tensile used)
Ultimate tensile strength	400MPasourcetypical	195MPasourcetensile strength, 5 mm/min
Flexural strength	not sourced	285MPasourceflexural strength at break
Elongation at break	25%sourcetypical, 1 in. rod	1.9%sourcestrain at break, 5 mm/min
Young's modulus (stiffness)	96.5GPasourcetypical, temper-independent	14.7GPasourcetypical, 1 mm/min
Density	8,498kg/m³sourcenominal	1,650kg/m³sourcetypical
Strength to weight	36.5kN·m/kg	118kN·m/kg3.24x higher
Stiffness to weight	11.4MN·m/kg27% higher	8.91MN·m/kg
Poisson's ratio	0.34sourcebase material: leaded free-machining brass CuZn39Pb2 (C37700), Wieland-Z30 rolled products, reference value at room temperature	0.35sourceglass-reinforced Fortron PPS (class value, not grade-specific)
Shear modulus	36GPa6.61x stiffer in shear	5.44GPa
Bulk modulus	101GPa	16.3GPa
Speed of sound	3,370m/s	2,985m/s
Thermal
Thermal conductivity	116W/m·Ksourcetypical, 20 °C	0.2W/m·Ksource40% glass-reinforced Fortron, 25 °C (not grade-specific)
Thermal expansion	20.5µm/m·Ksourcetypical, mean 20-300 °C	12µm/m·Ksourceparallel (flow), mean -50 to 90 °C
100 mm part over a 50 °C swing	103µm growth	60µm growth1.71x less
Specific heat	377J/kg·Ksourcetypical, 20 °C	not sourced
Heats up and cools (diffusivity)	36.2mm²/s	not sourced
Thermal shock resistance	11,997W/m83.5x more resistant	144W/m
Melting point	888–899°Csourcesolidus-liquidus	280°CsourceDSC, 10 °C/min
Glass transition	not sourced	90°CsourceDSC, 10 °C/min
Max service temperature	not sourced	270°CsourceHDT 1.8 MPa
Values for	C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values	Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013).

Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.

Questions

Is Brass C360 stronger than Plastic PPS GF40?

Brass C360 is stronger: its yield strength is 310 MPa against tensile strength 195 MPa for Plastic PPS GF40 (1.59x).

Which is lighter, Brass C360 or Plastic PPS GF40?

Plastic PPS GF40 is lighter: 1,650 kg/m³ against 8,498 kg/m³ for Brass C360.

Which is stiffer, Brass C360 or Plastic PPS GF40?

Brass C360 is stiffer: Young's modulus 96.5 GPa against 14.7 GPa for Plastic PPS GF40, so the same part in Brass C360 deflects less under the same load.

Which is lighter for the same job, Brass C360 or Plastic PPS GF40?

For the same stiffness or strength: Brass C360 is lighter for a stiff rod or tie (tension); Plastic PPS GF40 is lighter for a stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.

Part that must be	Brass C360	Plastic PPS GF40
Stiff rod or tie (tension)	lighter	27% heavier
Stiff beam (bending)	2.01x heavier	lighter
Stiff panel or plate	2.75x heavier	lighter
Strong rod or tie	3.24x heavier	lighter
Strong beam	3.78x heavier	lighter
Strong panel or plate	4.08x heavier	lighter

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 conducts heat better, Brass C360 or Plastic PPS GF40?

Brass C360 conducts heat better: 116 W/m·K against 0.2 W/m·K for Plastic PPS GF40.

Which expands less with temperature?

Plastic PPS GF40 expands less: 12 µm/m·K against 20.5 µm/m·K for Brass C360.

Among 72 materials

Stiffness against density

Strength against density