JIS ADC12 (Al-Si-Cu, about A383 / EN AC-46100) high-pressure die-casting alloy, as cast; physical properties from Daiki Aluminium Industry (ADC12 ingot producer) measured values; modulus from S.S.Aluminum (ADC12 ingot producer) standard 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 Aluminum ADC12 stronger than Plastic LCP GF30?
Aluminum ADC12 is stronger: its yield strength is 149 MPa against tensile strength 115 MPa for Plastic LCP GF30 (30%).
Which is lighter, Aluminum ADC12 or Plastic LCP GF30?
Plastic LCP GF30 is lighter: 1,610 kg/m³ against 2,680 kg/m³ for Aluminum ADC12.
Which is stiffer, Aluminum ADC12 or Plastic LCP GF30?
Aluminum ADC12 is stiffer: Young's modulus 79.8 GPa against 11.5 GPa for Plastic LCP GF30, so the same part in Aluminum ADC12 deflects less under the same load.
Which is lighter for the same job, Aluminum ADC12 or Plastic LCP GF30?
For the same stiffness or strength: Aluminum ADC12 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Plastic LCP GF30 is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum ADC12
Plastic LCP GF30
Stiff rod or tie (tension)
lighter
4.17x heavier
Stiff beam (bending)
lighter
1.58x heavier
Stiff panel or plate
lighter
15% heavier
Strong rod or tie
28% heavier
lighter
Strong beam
40% heavier
lighter
Strong panel or plate
46% 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, Aluminum ADC12 or Plastic LCP GF30?
Aluminum ADC12 conducts heat better: 125 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 21 µm/m·K for Aluminum ADC12.