AM50A (AM50A-F, M10500) Magnesium
AM50A magnesium is a magnesium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. AM50A is the ASTM designation for this material. M10500 is the UNS number.
It has a fairly high ductility among magnesium alloys. In addition, it has a fairly high melting temperature and a moderately low thermal conductivity.
The graph bars on the material properties cards below compare AM50A 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
58
Elastic (Young's, Tensile) Modulus
45 GPa 6.5 x 106 psi
Elongation at Break
11 %
Fatigue Strength
70 MPa 10 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
17 GPa 2.5 x 106 psi
Shear Strength
120 MPa 18 x 103 psi
Tensile Strength: Ultimate (UTS)
210 MPa 30 x 103 psi
Tensile Strength: Yield (Proof)
120 MPa 17 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Maximum Temperature: Mechanical
120 °C 240 °F
Melting Completion (Liquidus)
620 °C 1140 °F
Melting Onset (Solidus)
570 °C 1050 °F
Specific Heat Capacity
1000 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
65 W/m-K 38 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
16 % IACS
Electrical Conductivity: Equal Weight (Specific)
88 % 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 68 x 103 BTU/lb
Embodied Water
990 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
19 MJ/m3
Resilience: Unit (Modulus of Resilience)
150 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
71 points
Strength to Weight: Axial
35 points
Strength to Weight: Bending
47 points
Thermal Diffusivity
39 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
| Mg | 93.7 to 95.3 | |
| Al | 4.4 to 5.4 | |
| Mn | 0.26 to 0.6 | |
| Zn | 0 to 0.22 | |
| Si | 0 to 0.1 | |
| Cu | 0 to 0.010 | |
| Fe | 0 to 0.0040 | |
| Ni | 0 to 0.0020 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B94: Standard Specification for Magnesium-Alloy Die Castings
Essential Readings in Magnesium Technology, Suveen N. Mathaudhu et al. (editors), 2014
Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.
Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993