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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

Magnesium (Mg) 92.7 to 95.7
Aluminum (Al) 3.5 to 5.0
Silicon (Si) 0.5 to 1.5
Manganese (Mn) 0.35 to 0.7
Zinc (Zn) 0 to 0.12
Copper (Cu) 0 to 0.020
Iron (Fe) 0 to 0.0035
Nickel (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