AM100A (M10100) Magnesium
AM100A magnesium is a magnesium alloy. AM100A is the ASTM designation for this material. M10100 is the UNS number. It has a moderately low electrical conductivity and a fairly low melting temperature among magnesium alloys.
The properties of AM100A magnesium include five common variations. This page shows summary ranges across all of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare AM100A 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
46 GPa 6.7 x 106 psi
Elongation at Break
1.0 to 6.8 %
Fatigue Strength
48 to 70 MPa 7.0 to 10 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
18 GPa 2.6 x 106 psi
Shear Strength
90 to 150 MPa 13 to 22 x 103 psi
Tensile Strength: Ultimate (UTS)
160 to 270 MPa 23 to 39 x 103 psi
Tensile Strength: Yield (Proof)
78 to 140 MPa 11 to 20 x 103 psi
Thermal Properties
Latent Heat of Fusion
350 J/g
Maximum Temperature: Mechanical
140 °C 280 °F
Melting Completion (Liquidus)
590 °C 1100 °F
Melting Onset (Solidus)
460 °C 870 °F
Solidification (Pattern Maker's) Shrinkage
1.3 %
Specific Heat Capacity
990 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
73 W/m-K 42 BTU/h-ft-°F
Thermal Expansion
25 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
1000 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
1.3 to 15 MJ/m3
Resilience: Unit (Modulus of Resilience)
66 to 210 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
70 points
Strength to Weight: Axial
25 to 44 points
Strength to Weight: Bending
38 to 54 points
Thermal Diffusivity
43 mm2/s
Thermal Shock Resistance
9.7 to 17 points
Alloy Composition
| Mg | 87.9 to 90.6 | |
| Al | 9.3 to 10.7 | |
| Mn | 0.1 to 0.35 | |
| Si | 0 to 0.3 | |
| Zn | 0 to 0.3 | |
| Cu | 0 to 0.1 | |
| 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 B199: Standard Specification for Magnesium-Alloy Permanent Mold Castings
ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings
Welding and Joining of Magnesium Alloys, Liming Liu (editor), 2010
ASTM B80: Standard Specification for Magnesium-Alloy Sand 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.
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015