M1A (M1A-F, 3.5200, M15100) Magnesium
M1A magnesium is a magnesium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. M1A is the ASTM designation for this material. M15100 is the UNS number.
It has the highest electrical conductivity among magnesium alloys. In addition, it has the highest thermal conductivity and a very high melting temperature.
The graph bars on the material properties cards below compare M1A 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 6.6 x 106 psi
Elongation at Break
5.5 %
Fatigue Strength
88 MPa 13 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
18 GPa 2.6 x 106 psi
Shear Strength
120 MPa 17 x 103 psi
Tensile Strength: Ultimate (UTS)
230 MPa 33 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
95 °C 200 °F
Melting Completion (Liquidus)
610 °C 1130 °F
Melting Onset (Solidus)
580 °C 1080 °F
Specific Heat Capacity
990 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
150 W/m-K 85 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
35 % IACS
Electrical Conductivity: Equal Weight (Specific)
190 % IACS
Otherwise Unclassified Properties
Base Metal Price
12 % relative
Density
1.7 g/cm3 100 lb/ft3
Embodied Carbon
24 kg CO2/kg material
Embodied Energy
160 MJ/kg 67 x 103 BTU/lb
Embodied Water
970 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
11 MJ/m3
Resilience: Unit (Modulus of Resilience)
180 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
71 points
Strength to Weight: Axial
38 points
Strength to Weight: Bending
49 points
Thermal Diffusivity
88 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
| Mg | 97.2 to 98.8 | |
| Mn | 1.2 to 2.0 | |
| Ca | 0 to 0.3 | |
| Si | 0 to 0.1 | |
| Cu | 0 to 0.050 | |
| Ni | 0 to 0.010 | |
| res. | 0 to 0.3 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
ASTM B107: Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire
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.
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993