WE43A (M18430) Magnesium

WE43A magnesium is an alloy of magnesium. WE43A is the ASTM designation for this material. M18430 is the UNS number.

It has two 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.

Material Properties

Base Metal Price56 % rel

Density2.1 g/cm3 (130 lb/ft3)

Elastic (Young's, Tensile) Modulus44 GPa (6.4 x 106 psi)

Elongation at Break4.8 to 6.0 %

Fatigue Strength (Endurance Limit)150 MPa (22 x 103 psi)

Melting Onset (Solidus)570 °C (1060 °F)

Modulus of Resilience (Unit Resilience)290 to 330 kJ/m3

Poisson's Ratio0.29

Solidification (Pattern Maker's) Shrinkage1.6 %

Specific Heat Capacity940 J/kg-K

Strength to Weight Ratio120 to 130 kN-m/kg

Tensile Strength: Ultimate (UTS)250 to 270 MPa (36 to 39 x 103 psi)

Tensile Strength: Yield (Proof)160 to 170 MPa (23 to 25 x 103 psi)

Thermal Conductivity0.51 W/m-K

Thermal Diffusivity0.26 m2/s

Thermal Expansion27 µm/m-K

Unit Rupture Work (Ultimate Resilience)11 MJ/m3

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

Alloy Composition

Magnesium (Mg)89.9 to 93.5 %

Yttrium (Y)3.7 to 4.3 %

Unspecified Rare Earths2.4 to 4.4 %

Zirconium (Zr)0.4 to 1.0 %

Zinc (Zn)0 to 0.2 %

Manganese (Mn)0 to 0.15 %

Copper (Cu)0 to 0.030 %

Iron (Fe)0 to 0.010 %

Silicon (Si)0 to 0.010 %

Nickel (Ni)0 to 0.0050 %

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.

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993