AS41B (AS41B-F, M10412) Magnesium
AS41B magnesium is a magnesium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. AS41B is the ASTM designation for this material. M10412 is the UNS number.
It has a fairly high melting temperature among magnesium alloys. In addition, it has a moderately low thermal conductivity and a moderately low tensile strength.
The graph bars on the material properties cards below compare AS41B 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
6.0 %
Fatigue Strength
97 MPa 14 x 103 psi
Poisson's Ratio
0.29
Shear Modulus
18 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)
140 MPa 20 x 103 psi
Thermal Properties
Latent Heat of Fusion
370 J/g
Maximum Temperature: Mechanical
110 °C 230 °F
Melting Completion (Liquidus)
620 °C 1150 °F
Melting Onset (Solidus)
570 °C 1050 °F
Specific Heat Capacity
1000 J/kg-K 0.24 BTU/lb-°F
Thermal Conductivity
68 W/m-K 39 BTU/h-ft-°F
Thermal Expansion
26 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
17 % IACS
Electrical Conductivity: Equal Weight (Specific)
92 % 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
980 L/kg 120 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
11 MJ/m3
Resilience: Unit (Modulus of Resilience)
220 kJ/m3
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
72 points
Strength to Weight: Axial
35 points
Strength to Weight: Bending
47 points
Thermal Diffusivity
41 mm2/s
Thermal Shock Resistance
13 points
Alloy Composition
| Mg | 92.7 to 95.7 | |
| Al | 3.5 to 5.0 | |
| Si | 0.5 to 1.5 | |
| Mn | 0.35 to 0.7 | |
| Zn | 0 to 0.12 | |
| Cu | 0 to 0.020 | |
| Fe | 0 to 0.0035 | |
| 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