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AS41A (AS41A-F, M10410) Magnesium

AS41A magnesium is a magnesium alloy. It is typically furnished in the as-fabricated (no temper or treatment) condition. AS41A is the ASTM designation for this material. M10410 is the UNS number. It has a fairly high ductility among magnesium alloys. In addition, it has a moderately high melting temperature and a moderately low thermal conductivity. The graph bars on the material properties cards below compare AS41A magnesium to other magnesium alloys (top) and the entire database (bottom).

Mechanical Properties

Elastic (Young's, Tensile) Modulus

45 GPa 6.6 x 106 psi

Elongation at Break

11 %

Fatigue Strength

100 MPa 15 x 103 psi

Poisson's Ratio

0.29

Shear Modulus

18 GPa 2.5 x 106 psi

Shear Strength

130 MPa 19 x 103 psi

Tensile Strength: Ultimate (UTS)

230 MPa 33 x 103 psi

Tensile Strength: Yield (Proof)

140 MPa 20 x 103 psi

Thermal Properties

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

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)

21 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

38 points

Strength to Weight: Bending

50 points

Thermal Diffusivity

41 m2/s

Thermal Shock Resistance

14 points

Alloy Composition

Magnesium (Mg) 92.8 to 95.8
Aluminum (Al) 3.5 to 5.0
Silicon (Si) 0.5 to 1.5
Manganese (Mn) 0.18 to 0.7
Zinc (Zn) 0 to 0.2
Copper (Cu) 0 to 0.060
Nickel (Ni) 0 to 0.030
Iron (Fe) 0 to 0.0040
Residuals 0 to 0.010

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

Environmental Degradation of Advanced and Traditional Engineering Materials, Lloyd H. Hihara et al., 2014.

ISO 16220: Magnesium and magnesium alloys - Magnesium alloy ingots and castings