EN-MC21120-T4 Magnesium
EN-MC21120-T4 is EN-MC21120 magnesium in the T4 temper. To achieve this temper, the metal is solution heat-treated and naturally aged. It has the highest ductility compared to the other variants of EN-MC21120 magnesium. The graph bars on the material properties cards below compare EN-MC21120-T4 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
Brinell Hardness
63
Elastic (Young's, Tensile) Modulus
46 GPa 6.7 x 106 psi
Elongation at Break
6.7 %
Fatigue Strength
95 MPa 14 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
18 GPa 2.6 x 106 psi
Shear Strength
160 MPa 23 x 103 psi
Tensile Strength: Ultimate (UTS)
270 MPa 39 x 103 psi
Tensile Strength: Yield (Proof)
130 MPa 19 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Maximum Temperature: Mechanical
130 °C 270 °F
Melting Completion (Liquidus)
600 °C 1120 °F
Melting Onset (Solidus)
490 °C 910 °F
Specific Heat Capacity
990 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
76 W/m-K 44 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
11 % IACS
Electrical Conductivity: Equal Weight (Specific)
59 % IACS
Otherwise Unclassified Properties
Base Metal Price
12 % relative
Density
1.7 g/cm3 110 lb/ft3
Embodied Carbon
22 kg CO2/kg material
Embodied Energy
160 MJ/kg 68 x 103 BTU/lb
Embodied Water
990 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
15 MJ/m3
Resilience: Unit (Modulus of Resilience)
190 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
69 points
Strength to Weight: Axial
43 points
Strength to Weight: Bending
53 points
Thermal Diffusivity
44 mm2/s
Thermal Shock Resistance
16 points
Alloy Composition
| Mg | 88.6 to 91.3 | |
| Al | 8.3 to 9.7 | |
| Zn | 0.35 to 1.0 | |
| Mn | 0.1 to 0.5 | |
| Si | 0 to 0.2 | |
| Cu | 0 to 0.030 | |
| Fe | 0 to 0.0050 | |
| Ni | 0 to 0.0020 | |
| res. | 0 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ISO 16220: Magnesium and magnesium alloys - Magnesium alloy ingots and castings
EN 1753: Magnesium and magnesium alloys. Magnesium alloy ingots and castings