EN-MC65120 (MgRE3Zn2Zr) Magnesium
EN-MC65120 magnesium is a magnesium alloy. Cited properties are appropriate for the T5 temper. To achieve this temper, the metal is artificially aged until it meets standard mechanical property requirements. MC65120 is the EN numeric designation for this material. MgRE3Zn2Zr is the EN chemical designation. Additionally, the British Standard (BS) designation is MAG 6. And the AFNOR (French) designation is G-TR3Z2.
It has a very low tensile strength among magnesium alloys. In addition, it has a moderately high density and a fairly high base cost.
The graph bars on the material properties cards below compare EN-MC65120 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
Brinell Hardness
55
Elastic (Young's, Tensile) Modulus
45 GPa 6.5 x 106 psi
Elongation at Break
3.1 %
Fatigue Strength
80 MPa 12 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
17 GPa 2.5 x 106 psi
Shear Strength
92 MPa 13 x 103 psi
Tensile Strength: Ultimate (UTS)
160 MPa 23 x 103 psi
Tensile Strength: Yield (Proof)
110 MPa 16 x 103 psi
Thermal Properties
Latent Heat of Fusion
330 J/g
Maximum Temperature: Mechanical
180 °C 350 °F
Melting Completion (Liquidus)
590 °C 1100 °F
Melting Onset (Solidus)
520 °C 970 °F
Specific Heat Capacity
970 J/kg-K 0.23 BTU/lb-°F
Thermal Conductivity
100 W/m-K 60 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
25 % IACS
Electrical Conductivity: Equal Weight (Specific)
120 % IACS
Otherwise Unclassified Properties
Base Metal Price
25 % relative
Density
1.9 g/cm3 120 lb/ft3
Embodied Carbon
25 kg CO2/kg material
Embodied Energy
190 MJ/kg 83 x 103 BTU/lb
Embodied Water
930 L/kg 110 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
4.4 MJ/m3
Resilience: Unit (Modulus of Resilience)
140 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
62 points
Strength to Weight: Axial
23 points
Strength to Weight: Bending
34 points
Thermal Diffusivity
56 mm2/s
Thermal Shock Resistance
9.8 points
Alloy Composition
| Mg | 91.8 to 95.1 | |
| Zn | 2.0 to 3.0 | |
| Zr | 0.4 to 1.0 | |
| Mn | 0 to 0.15 | |
| Cu | 0 to 0.030 | |
| Si | 0 to 0.010 | |
| Fe | 0 to 0.010 | |
| Ni | 0 to 0.0050 | |
| rare e. | 2.5 to 4.0 | |
| res. | 0 to 0.010 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ISO 16220: Magnesium and magnesium alloys - Magnesium alloy ingots and castings
EN 1753: Magnesium and magnesium alloys. Magnesium alloy ingots and castings