Materials / Compare

Aluminum A380 vs. Titanium

Compare Aluminum A380 vs. Titanium strength, stiffness, weight and thermal properties.

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Aluminum A380Cast
TitaniumWrought
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Mechanical
Yield strength160MPasourcetypical, 25 °C885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset
Ultimate tensile strength320MPasourcetypical, 25 °C940MPasourcetypical, plate, annealed
Elongation at break3.5%sourcetypical16%sourcetypical, in 2 in., plate annealed
Young's modulus (stiffness)71GPasourcetypical, 25 °C107–122GPasourcetypical range, 20 °C
Density2,713kg/m³sourcetypical at 68 °F4,430kg/m³sourcenominal
Strength to weight59kN·m/kg200kN·m/kg3.39x higher
Stiffness to weight26.2MN·m/kg1% higher25.8MN·m/kg
Poisson's rationot sourced0.342sourcemean of TIMET measurements
Shear modulusnot sourced42.7GPa
Bulk modulusnot sourced121GPa
Speed of sound5,116m/s5,084m/s
Thermal
Thermal conductivity96.2W/m·Ksourcetypical at 68 °F6.6W/m·Ksourcetypical, 20 °C, mill annealed
Thermal expansion21.8µm/m·Ksourcetypical, 68-572 °F (20-300 °C)9µm/m·Ksourcetypical, mean 0-100 °C
100 mm part over a 50 °C swing109µm growth45µm growth2.42x less
Specific heat963J/kg·Ksourcetypical at 68 °F580J/kg·Ksourcetypical, 20 °C
Heats up and cools (diffusivity)36.8mm²/s14.3x faster2.57mm²/s
Thermal shock resistancenot sourced3,730W/m
Melting pointnot sourced1,630–1,650°Csourcemelting range
Max service temperaturenot sourced400°Csourceupper recommended use temperature
Values forA380 aluminium high-pressure die-casting alloy, typical properties; Rheocast Company (aluminium die caster, Germantown WI) A380 alloy data page.TIMETAL 6-4 (Ti-6Al-4V Grade 5) annealed plate typical (TIMET properties manual) + TIMET datasheet TMC-0150 physical properties

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 A380 stronger than Titanium?

Titanium is stronger: its yield strength is 885 MPa against 160 MPa for Aluminum A380 (5.53x).

Which is lighter, Aluminum A380 or Titanium?

Aluminum A380 is lighter: 2,713 kg/m³ against 4,430 kg/m³ for Titanium.

Which is stiffer, Aluminum A380 or Titanium?

Titanium is stiffer: Young's modulus 115 GPa against 71 GPa for Aluminum A380, so the same part in Titanium deflects less under the same load.

Which is lighter for the same job, Aluminum A380 or Titanium?

For the same stiffness or strength: Aluminum A380 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Titanium is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must beAluminum A380Titanium
Stiff rod or tie (tension)lighter1% heavier
Stiff beam (bending)lighter29% heavier
Stiff panel or platelighter39% heavier
Strong rod or tie3.39x heavierlighter
Strong beam1.92x heavierlighter
Strong panel or plate44% heavierlighter

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 A380 or Titanium?

Aluminum A380 conducts heat better: 96.2 W/m·K against 6.6 W/m·K for Titanium.

Which expands less with temperature?

Titanium expands less: 9 µm/m·K against 21.8 µm/m·K for Aluminum A380.

Among 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4SiliconCeramic Alumina 96%Ceramic Aluminum NitrideAluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Aluminum A380Titanium
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLA Resin Elastic 50ASLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4SiliconCeramic Alumina 96%Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Aluminum A380Titanium
Strength against density

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