Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal 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
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.
Brass C360
C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values
1
NA Alloys Product DataDaiki Aluminium IndustryAluminum ADC12 · Yield strength: one test result, 0.2% proof stress, as cast, ASTM tensile bar (Daiki)Aluminum ADC12 · Ultimate tensile strength: one test result, as cast, ASTM tensile bar (Daiki)Aluminum ADC12 · Elongation at break: one test result, as cast, ASTM tensile bar (Daiki)
Die-Casting Alloys (ダイカスト用合金)S.S. AluminumAluminum ADC12 · Young's modulus (stiffness): standard value (S.S.Aluminum)
4
DIK365 Product DataDaiki Aluminium IndustryAluminum ADC12 · Density: measured (Daiki)Aluminum ADC12 · Thermal conductivity: measured on specimens cut from a 50 x 100 x 5 mm flat die casting (Daiki)Aluminum ADC12 · Thermal expansion: measured, temperature range not stated (Daiki)Aluminum ADC12 · Specific heat: measured (Daiki)Aluminum ADC12 · Melting point: solidus-liquidus (Daiki)
5
Wieland-Z30 (CuZn39Pb2, C37700) Data SheetWielandarchived copyBrass C360 · Poisson's ratio: base material: leaded free-machining brass CuZn39Pb2 (C37700), Wieland-Z30 rolled products, reference value at room 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.
Questions
Mechanical
Is Aluminum ADC12 stronger than Brass C360?
Brass C360 is stronger: its yield strength is 310 MPa against 149 MPa for Aluminum ADC12 (2.08x).
Which is lighter, Aluminum ADC12 or Brass C360?
Aluminum ADC12 is lighter: 2,680 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Aluminum ADC12 or Brass C360?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 79.8 GPa for Aluminum ADC12, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Aluminum ADC12 or Brass C360?
For the same stiffness or strength: Aluminum ADC12 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
Aluminum ADC12
Brass C360
Stiff rod or tie (tension)
lighter
2.62x heavier
Stiff beam (bending)
lighter
2.88x heavier
Stiff panel or plate
lighter
2.98x heavier
Strong rod or tie
lighter
1.52x heavier
Strong beam
lighter
1.95x heavier
Strong panel or plate
lighter
2.2x 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, Aluminum ADC12 or Brass C360?
Brass C360 stretches further before it breaks: 25% elongation at break against 2.3% for Aluminum ADC12.
Thermal
Which conducts heat better, Aluminum ADC12 or Brass C360?
Aluminum ADC12 conducts heat better: 125 W/m·K against 116 W/m·K for Brass C360.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 21 µm/m·K for Aluminum ADC12.