# M1A (M1A-F, 3.5200, M15100) Magnesium

M1A magnesium is a magnesium alloy. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. M1A is the ASTM designation for this material. M15100 is the UNS number.

It has the highest electrical conductivity among magnesium alloys. In addition, it has the highest thermal conductivity and a very high melting temperature.

The graph bars on the material properties cards below compare M1A 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 10 ^{6} psi*

Elongation at Break

5.5 *%*

Fatigue Strength

88 *MPa* 13 *x 10 ^{3} psi*

Poisson's Ratio

0.29

Shear Modulus

18 *GPa* 2.6 *x 10 ^{6} psi*

Shear Strength

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

Tensile Strength: Ultimate (UTS)

230 *MPa* 33 *x 10 ^{3} psi*

Tensile Strength: Yield (Proof)

130 *MPa* 19 *x 10 ^{3} psi*

## Thermal Properties

Latent Heat of Fusion

350 *J/g*

Maximum Temperature: Mechanical

95 *°C* 200 *°F*

Melting Completion (Liquidus)

610 *°C* 1130 *°F*

Melting Onset (Solidus)

580 *°C* 1080 *°F*

Specific Heat Capacity

990 *J/kg-K* 0.24 *BTU/lb-°F*

Thermal Conductivity

150 *W/m-K* 85 *BTU/h-ft-°F*

Thermal Expansion

26 *µm/m-K*

## Electrical Properties

Electrical Conductivity: Equal Volume

35 *% IACS*

Electrical Conductivity: Equal Weight (Specific)

190 *% IACS*

## Otherwise Unclassified Properties

Base Metal Price

12 *% relative*

Density

1.7 *g/cm ^{3}* 100

*lb/ft*

^{3}Embodied Carbon

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

Embodied Energy

160 *MJ/kg* 67 *x 10 ^{3} BTU/lb*

Embodied Water

970 *L/kg* 120 *gal/lb*

## Common Calculations

Resilience: Ultimate (Unit Rupture Work)

11 *MJ/m ^{3}*

Resilience: Unit (Modulus of Resilience)

180 *kJ/m ^{3}*

Stiffness to Weight: Axial

15 *points*

Stiffness to Weight: Bending

71 *points*

Strength to Weight: Axial

38 *points*

Strength to Weight: Bending

49 *points*

Thermal Diffusivity

88 *mm ^{2}/s*

Thermal Shock Resistance

13 *points*

## Alloy Composition

Mg | 97.2 to 98.8 | |

Mn | 1.2 to 2.0 | |

Ca | 0 to 0.3 | |

Si | 0 to 0.1 | |

Cu | 0 to 0.050 | |

Ni | 0 to 0.010 | |

res. | 0 to 0.3 |

All values are % weight. Ranges represent what is permitted under applicable standards.

## Followup Questions

## Similar Alloys

## Further Reading

ASTM B107: Standard Specification for Magnesium-Alloy Extruded Bars, Rods, Profiles, Tubes, and Wire

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.

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