Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
Sources2 documents: Magnesium Elektron, U.S. Department of Defense
Values for
Cast. ELEKTRON AZ91D magnesium die-casting alloy, as cast; Magnesium Elektron datasheet 475 (7/01), typical properties; Poisson from MIL-HDBK-5J for AZ91C castings.
1
Elektron Die Casting Alloys (Datasheet 475)Magnesium Elektronarchived copyYield strength: typical, 0.2% tensile yield, ambient temperatureUltimate tensile strength: typical, ambient temperatureElongation at break: typical, ambient temperatureYoung's modulus (stiffness): typicalDensity: typicalThermal conductivity: typicalThermal expansion: typical, temperature range not statedSpecific heat: typicalMelting point: melting range
2
MIL-HDBK-5J, Metallic Materials and Elements for Aerospace Vehicle Structures (2003)U.S. Department of DefensePoisson's ratio: base material: AZ91C casting (MIL-HDBK-5J handbook physical constant)
Magnesium AZ91D has a thermal conductivity of 72 W/m·K (41.6 BTU/hr·ft·°F). Basis: typical. Source: Magnesium Elektron, Elektron Die Casting Alloys (Datasheet 475)archived copy.
Specific heat of Magnesium AZ91D
The specific heat capacity of Magnesium AZ91D is 1,050 J/kg·K (0.251 BTU/lb·°F). Basis: typical. Source: Magnesium Elektron, Elektron Die Casting Alloys (Datasheet 475)archived copy.
Coefficient of thermal expansion of Magnesium AZ91D
Magnesium AZ91D expands 25 µm/m·K (13.9 µin/in·°F): a 100 mm part grows 125 µm over a 50 °C rise. Basis: typical, temperature range not stated. Source: Magnesium Elektron, Elektron Die Casting Alloys (Datasheet 475)archived copy.
Thermal diffusivity of Magnesium AZ91D
Computed from the conductivity, density and specific heat (k / ρc): 37.9 mm²/s, how fast a temperature change spreads through it.
Melting point of Magnesium AZ91D
Magnesium AZ91D melts at 470–595 °C (878–1,103 °F). Basis: melting range. Source: Magnesium Elektron, Elektron Die Casting Alloys (Datasheet 475)archived copy.