AZ91C magnesium is an alloy of magnesium. AZ91C is the ASTM designation for this material. M11914 is the UNS number.
It has four common variants, each represented as a separate material. The Material Properties section below shows ranges encompassing all variants. For more specific values, follow the links in the Variant Materials section.
Base Metal Price20 % rel
Density1.9 g/cm3 (120 lb/ft3)
Elastic (Young's, Tensile) Modulus48 GPa (7.0 x 106 psi)
Elongation at Break2.3 to 8.1 %
Melting Onset (Solidus)470 °C (880 °F)
Modulus of Resilience (Unit Resilience)75 to 180 kJ/m3
Solidification (Pattern Maker's) Shrinkage1.3 %
Specific Heat Capacity990 J/kg-K
Strength to Weight Ratio89 to 140 kN-m/kg
Tensile Strength: Ultimate (UTS)170 to 270 MPa (25 to 39 x 103 psi)
Tensile Strength: Yield (Proof)85 to 130 MPa (12 to 19 x 103 psi)
Thermal Expansion26 µm/m-K
Unit Rupture Work (Ultimate Resilience)3.3 to 3.6 MJ/m3
The length of each bar compares the given value to the highest value in the database.
Magnesium (Mg)88.6 to 91.4 %
Aluminum (Al)8.1 to 9.3 %
Zinc (Zn)0.4 to 1.0 %
Manganese (Mn)0.13 to 0.35 %
Residuals0 to 0.3 %
Silicon (Si)0 to 0.3 %
Copper (Cu)0 to 0.1 %
Nickel (Ni)0 to 0.010 %
ASTM B199: Standard Specification for Magnesium-Alloy Permanent Mold Castings
ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings
ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings
Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.