ISO-WD32250 (MgZn3Zr) Magnesium
ISO-WD32250 magnesium is a magnesium alloy. WD32250 is the ISO numeric designation for this material. Additionally, the British Standard (BS) designation is MAG 151.
It has a very high thermal conductivity among magnesium alloys. In addition, it can have a fairly high tensile strength and has a moderately high base cost.
The properties of ISO-WD32250 magnesium include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare ISO-WD32250 magnesium to other magnesium alloys (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
45 GPa 6.5 x 106 psi
Elongation at Break
4.5 to 8.6 %
Fatigue Strength
170 to 210 MPa 25 to 31 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
17 GPa 2.5 x 106 psi
Shear Strength
180 to 190 MPa 26 to 28 x 103 psi
Tensile Strength: Ultimate (UTS)
310 to 330 MPa 45 to 47 x 103 psi
Tensile Strength: Yield (Proof)
240 to 290 MPa 35 to 42 x 103 psi
Thermal Properties
Latent Heat of Fusion
340 J/g
Maximum Temperature: Mechanical
120 °C 240 °F
Melting Completion (Liquidus)
600 °C 1110 °F
Melting Onset (Solidus)
550 °C 1030 °F
Specific Heat Capacity
980 J/kg-K 0.23 BTU/lb-°F
Thermal Conductivity
130 W/m-K 72 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
25 % IACS
Electrical Conductivity: Equal Weight (Specific)
130 % IACS
Otherwise Unclassified Properties
Base Metal Price
13 % relative
Density
1.8 g/cm3 110 lb/ft3
Embodied Carbon
24 kg CO2/kg material
Embodied Energy
160 MJ/kg 71 x 103 BTU/lb
Embodied Water
950 L/kg 110 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
14 to 26 MJ/m3
Resilience: Unit (Modulus of Resilience)
630 to 930 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
67 points
Strength to Weight: Axial
49 to 51 points
Strength to Weight: Bending
58 to 60 points
Thermal Diffusivity
72 mm2/s
Thermal Shock Resistance
19 to 20 points
Alloy Composition
| Mg | 94.9 to 97.1 | |
| Zn | 2.5 to 4.0 | |
| Zr | 0.45 to 0.8 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys
Essential Readings in Magnesium Technology, Suveen N. Mathaudhu et al. (editors), 2014