ISO-WD21150-H22 Magnesium
ISO-WD21150-H22 is ISO-WD21150 magnesium in the H22 temper. To achieve this temper, the metal is strain hardened, and then partially annealed, to a strength that is roughly a quarter of the way between annealed (O) and full-hard (H28).
The graph bars on the material properties cards below compare ISO-WD21150-H22 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
7.4 %
Poisson's Ratio
0.29
Shear Modulus
17 GPa 2.5 x 106 psi
Shear Strength
160 MPa 23 x 103 psi
Tensile Strength: Ultimate (UTS)
270 MPa 38 x 103 psi
Tensile Strength: Yield (Proof)
160 MPa 23 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Maximum Temperature: Mechanical
110 °C 230 °F
Melting Completion (Liquidus)
600 °C 1110 °F
Melting Onset (Solidus)
550 °C 1020 °F
Specific Heat Capacity
990 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
100 W/m-K 58 BTU/h-ft-°F
Thermal Expansion
27 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
19 % IACS
Electrical Conductivity: Equal Weight (Specific)
100 % IACS
Otherwise Unclassified Properties
Base Metal Price
12 % relative
Density
1.7 g/cm3 100 lb/ft3
Embodied Carbon
23 kg CO2/kg material
Embodied Energy
160 MJ/kg 67 x 103 BTU/lb
Embodied Water
980 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
17 MJ/m3
Resilience: Unit (Modulus of Resilience)
280 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
70 points
Strength to Weight: Axial
44 points
Strength to Weight: Bending
55 points
Thermal Diffusivity
60 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
| Mg | 94 to 97 | |
| Al | 2.4 to 3.6 | |
| Zn | 0.5 to 1.5 | |
| Mn | 0.15 to 0.4 | |
| Si | 0 to 0.1 | |
| Cu | 0 to 0.050 | |
| Ni | 0 to 0.0050 | |
| Fe | 0 to 0.0050 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ISO 3116: Magnesium and magnesium alloys - Wrought magnesium alloys
ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings