# AM50A (AM50A-F, M10500) Magnesium

AM50A magnesium is a magnesium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. AM50A is the ASTM designation for this material. M10500 is the UNS number.

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

The graph bars on the material properties cards below compare AM50A 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

Brinell Hardness

58

Elastic (Young's, Tensile) Modulus

45 *GPa* 6.5 *x 10 ^{6} psi*

Elongation at Break

11 *%*

Fatigue Strength

70 *MPa* 10 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

17 *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)

120 *MPa* 17 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

350 *J/g*

Maximum Temperature: Mechanical

120 *°C* 240 *°F*

Melting Completion (Liquidus)

620 *°C* 1140 *°F*

Melting Onset (Solidus)

570 *°C* 1050 *°F*

Specific Heat Capacity

1000 *J/kg-K* 0.24 *BTU/lb-°F*

Thermal Conductivity

65 *W/m-K* 38 *BTU/h-ft-°F*

Thermal Expansion

26 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

16 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

88 *% IACS*

## 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

990 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

19 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

150 *kJ/m ^{3}*

Stiffness to Weight: Axial

15 *points*

Stiffness to Weight: Bending

71 *points*

Strength to Weight: Axial

35 *points*

Strength to Weight: Bending

47 *points*

Thermal Diffusivity

39 *m ^{2}/s*

Thermal Shock Resistance

13 *points*

## Alloy Composition

Mg | 93.7 to 95.3 | |

Al | 4.4 to 5.4 | |

Mn | 0.26 to 0.6 | |

Zn | 0 to 0.22 | |

Si | 0 to 0.1 | |

Cu | 0 to 0.010 | |

Fe | 0 to 0.0040 | |

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

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

Advanced Materials in Automotive Engineering, Jason Rowe (editor), 2012

Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993