Brass C360 vs. Plastic LCP GF30

Compare Brass C360 vs. Plastic LCP GF30 strength, stiffness, weight and thermal properties.

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Plastic LCP GF30Bulk 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	115MPasourcetensile strength (ISO 527)
Flexural strength	not sourced	184MPasourcetypical (ISO 178)
Elongation at break	25%sourcetypical, 1 in. rod	1.5%sourcetensile elongation (ISO 527)
Young's modulus (stiffness)	96.5GPasourcetypical, temper-independent	11.5GPasourcetensile modulus (ISO 527)
Density	8,498kg/m³sourcenominal	1,610kg/m³sourcetypical
Strength to weight	36.5kN·m/kg	71.4kN·m/kg1.96x higher
Stiffness to weight	11.4MN·m/kg1.59x higher	7.14MN·m/kg
Poisson's ratio	0.34sourcebase material: leaded free-machining brass CuZn39Pb2 (C37700), Wieland-Z30 rolled products, reference value at room temperature	not sourced
Shear modulus	36GPa	not sourced
Bulk modulus	101GPa	not sourced
Speed of sound	3,370m/s	2,673m/s
Thermal
Thermal conductivity	116W/m·Ksourcetypical, 20 °C	0.5W/m·Ksourcehot disk (ISO 22007-2), temperature not stated
Thermal expansion	20.5µm/m·Ksourcetypical, mean 20-300 °C	20µm/m·Ksourceflow direction (MD), mean 50-150 °C
100 mm part over a 50 °C swing	103µm growth	100µm growth3% less
Specific heat	377J/kg·Ksourcetypical, 20 °C	839J/kg·KsourceASTM E1269, temperature not stated
Heats up and cools (diffusivity)	36.2mm²/s97.9x faster	0.37mm²/s
Thermal shock resistance	11,997W/m	not sourced
Melting point	888–899°Csourcesolidus-liquidus	not sourced
Max service temperature	not sourced	288°CsourceHDT 1.8 MPa (ISO 75)
Values for	C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values	Sumitomo Chemical SUMIKASUPER LCP E6006L (30% glass fibre; high strength, low shrinkage); SUMIKASUPER LCP Technical Note, Version 04 / Nov. 2023, typical values.

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 LCP GF30?

Brass C360 is stronger: its yield strength is 310 MPa against tensile strength 115 MPa for Plastic LCP GF30 (2.7x).

Which is lighter, Brass C360 or Plastic LCP GF30?

Plastic LCP GF30 is lighter: 1,610 kg/m³ against 8,498 kg/m³ for Brass C360.

Which is stiffer, Brass C360 or Plastic LCP GF30?

Brass C360 is stiffer: Young's modulus 96.5 GPa against 11.5 GPa for Plastic LCP GF30, so the same part in Brass C360 deflects less under the same load.

Which is lighter for the same job, Brass C360 or Plastic LCP GF30?

For the same stiffness or strength: Brass C360 is lighter for a stiff rod or tie (tension); Plastic LCP GF30 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 LCP GF30
Stiff rod or tie (tension)	lighter	1.59x heavier
Stiff beam (bending)	1.82x heavier	lighter
Stiff panel or plate	2.6x heavier	lighter
Strong rod or tie	1.96x heavier	lighter
Strong beam	2.73x heavier	lighter
Strong panel or plate	3.21x 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 LCP GF30?

Brass C360 conducts heat better: 116 W/m·K against 0.5 W/m·K for Plastic LCP GF30.

Which expands less with temperature?

Plastic LCP GF30 expands less: 20 µm/m·K against 20.5 µm/m·K for Brass C360.

Among 72 materials

Stiffness against density

Strength against density