# AS41B (AS41B-F, M10412) Magnesium

AS41B magnesium is a magnesium alloy. It is typically furnished in the as-fabricated (no temper or treatment) condition. AS41B is the ASTM designation for this material. M10412 is the UNS number.

It has a moderately high melting temperature among magnesium alloys. In addition, it has a moderately low tensile strength and a moderately low thermal conductivity.

The graph bars on the material properties cards below compare AS41B magnesium to other magnesium alloys (top) and the entire database (bottom).

## Mechanical Properties

Elastic (Young's, Tensile) Modulus

45 *GPa* 6.6 *x 10 ^{6} psi*

Elongation at Break

6.0 *%*

Fatigue Strength

97 *MPa* 14 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

18 *GPa* 2.5 *x 10 ^{6} psi*

Shear Strength

120 *MPa* 18 *x 10 ^{3} psi*

Tensile Strength: Ultimate (UTS)

210 *MPa* 30 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

140 *MPa* 20 *x 10 ^{3} 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/cm ^{3}* 100

*lb/ft*

^{3}Embodied Carbon

23 *kg CO _{2}/kg material*

Embodied Energy

160 *MJ/kg* 68 *x 10 ^{3} BTU/lb*

Embodied Water

980 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

11 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

220 *kJ/m ^{3}*

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 *m ^{2}/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