ZK51A (ZK51A-T5, M16510) Magnesium

ZK51A magnesium is an alloy of magnesium. It is typically furnished in the T5 temper. ZK51A is the ASTM designation for this material. M16510 is the UNS number.

Material Properties

Base Metal Price22 % rel

Density2.0 g/cm3 (120 lb/ft3)

Elastic (Young's, Tensile) Modulus48 GPa (7.0 x 106 psi)

Elongation at Break4.8 %

Melting Onset (Solidus)550 °C (1020 °F)

Modulus of Resilience (Unit Resilience)230 kJ/m3

Poisson's Ratio0.29

Shear Strength160 MPa (23 x 103 psi)

Solidification (Pattern Maker's) Shrinkage1.3 %

Specific Heat Capacity970 J/kg-K

Strength to Weight Ratio120 kN-m/kg

Tensile Strength: Ultimate (UTS)240 MPa (35 x 103 psi)

Tensile Strength: Yield (Proof)150 MPa (22 x 103 psi)

Thermal Expansion25 µm/m-K

Unit Rupture Work (Ultimate Resilience)10 MJ/m3

The length of each bar compares the given value to the highest value in the database.

Alloy Composition

Magnesium (Mg)93.1 to 95.9 %

Zinc (Zn)3.6 to 5.5 %

Zirconium (Zr)0.5 to 1.0 %

Residuals0 to 0.3 %

Copper (Cu)0 to 0.1 %

Nickel (Ni)0 to 0.010 %

Further Reading

ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings

Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.