Aluminum 7075-T6

Aluminum 7075-T6 (high-strength) strength, stiffness, density and thermal properties, with their source.

A bracket in Aluminum 7075-T6, brushed finish.

Mechanical
Yield strength	503MPa1
Ultimate tensile strength	572MPa1
Elongation at break	11%1
Young's modulus (stiffness)	71GPa1
Density	2,800kg/m³2
Strength to weight	180kN·m/kg
Stiffness to weight	25.4MN·m/kg
Poisson's ratio	0.333
Shear modulus	26.7GPa
Bulk modulus	69.6GPa
Speed of sound	5,036m/s

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal
Thermal conductivity	130W/m·K2
Thermal expansion	23.4µm/m·K2
100 mm part over a 50 °C swing	117µm growth
Specific heat	960J/kg·K2
Heats up and cools (diffusivity)	48.4mm²/s
Thermal shock resistance	26,370W/m
Melting point	melting range532–635°C2

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

Sources3 documents: Kaiser Aluminum, U.S. Department of Defense

Values for: Wrought. 7075-T6/T651, Kaiser Aluminum rod & bar (mechanical) and sheet/coil/plate (physical) typical datasheets; Poisson from MIL-HDBK-5J

1
Alloy 7075 Rod & Bar Technical DataKaiser Aluminumarchived copyYield strength: typical, 0.2% offset, .500 in dia specimenUltimate tensile strength: typicalElongation at break: typical, in 4DYoung's modulus (stiffness): typical
2
Alloy 7075 Sheet, Coil & Plate Technical DataKaiser Aluminumarchived copyDensity: nominalThermal conductivity: typical, 20 °C, T651Thermal expansion: typical, mean 20-100 °CSpecific heat: typical, at 100 °CMelting point: melting range
3
MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (2003)U.S. Department of DefensePoisson's ratio: typical (handbook physical constant)

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Thermal properties of Aluminum 7075-T6

Thermal conductivity of Aluminum 7075-T6

Aluminum 7075-T6 has a thermal conductivity of 130 W/m·K (75.1 BTU/hr·ft·°F). Basis: typical, 20 °C, T651. Source: Kaiser Aluminum, Alloy 7075 Sheet, Coil & Plate Technical Dataarchived copy.

Specific heat of Aluminum 7075-T6

The specific heat capacity of Aluminum 7075-T6 is 960 J/kg·K (0.229 BTU/lb·°F). Basis: typical, at 100 °C. Source: Kaiser Aluminum, Alloy 7075 Sheet, Coil & Plate Technical Dataarchived copy.

Coefficient of thermal expansion of Aluminum 7075-T6

Aluminum 7075-T6 expands 23.4 µm/m·K (13 µin/in·°F): a 100 mm part grows 117 µm over a 50 °C rise. Basis: typical, mean 20-100 °C. Source: Kaiser Aluminum, Alloy 7075 Sheet, Coil & Plate Technical Dataarchived copy.

Thermal diffusivity of Aluminum 7075-T6

Computed from the conductivity, density and specific heat (k / ρc): 48.4 mm²/s, how fast a temperature change spreads through it.

Melting point of Aluminum 7075-T6

Aluminum 7075-T6 melts at 532–635 °C (990–1,175 °F). Basis: melting range. Source: Kaiser Aluminum, Alloy 7075 Sheet, Coil & Plate Technical Dataarchived copy.