AM100A-T61 Magnesium
AM100A-T61 magnesium is AM100A magnesium in the T61 temper. To achieve this temper, the metal is solution heat-treated and artificially underaged. The degree of underaging is different from T64 and T65. It has the lowest ductility compared to the other variants of AM100A magnesium.
The graph bars on the material properties cards below compare AM100A-T61 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 %
Fatigue Strength
70 MPa 10 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
18 GPa 2.6 x 106 psi
Shear Strength
150 MPa 22 x 103 psi
Tensile Strength: Ultimate (UTS)
270 MPa 39 x 103 psi
Tensile Strength: Yield (Proof)
140 MPa 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)
2.3 MJ/m3
Resilience: Unit (Modulus of Resilience)
210 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
70 points
Strength to Weight: Axial
44 points
Strength to Weight: Bending
54 points
Thermal Diffusivity
43 mm2/s
Thermal Shock Resistance
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
Further Reading
ASTM B199: Standard Specification for Magnesium-Alloy Permanent Mold 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