AZ81A-T4 Magnesium

Magnesium Alloys

Overview Chemical Composition Mechanical Properties Physical Properties Other Properties

Property Overview

Density1.7g/cm³

Elastic Modulus46GPa

Tensile Strength240MPa

Yield Strength84MPa

Brinell Hardness55HB

Maximum Service Temperature130°C

Weight Calculator

Chemical Composition

0 to 0.010%

0.13 to 0.35%

0 to 0.3%

0 to 0.1%

7.0 to 8.1%

89.8 to 92.5%

RES.

Residuals res. | | 0 to 0.3%

RESIDUALS RES.

0 to 0.3%

0.4 to 1.0%

Mechanical

Compressive (Crushing) Strength

370 MPa

Elastic (Young's, Tensile) Modulus

46 GPa

Elongation at Break

8.8 %

Fatigue Strength

78 MPa

Poisson's Ratio

0.29

Shear Modulus

18 GPa

Shear Strength

130 MPa

Tensile Strength: Ultimate (UTS)

240 MPa

Tensile Strength: Yield (Proof)

84 MPa

Hardness

Brinell Hardness

Physical

Density

1.7 g/cm 3

Thermal

Latent Heat of Fusion

350 J/g

Maximum Temperature: Mechanical

130 °C

Melting Completion (Liquidus)

600 °C

Melting Onset (Solidus)

500 °C

Solidification (Pattern Maker's) Shrinkage

1.3 %

Specific Heat Capacity

990 J/kg-K

Thermal Conductivity

84 W/m-K

Thermal Diffusivity

50 mm 2 /s

Thermal Expansion

27 µm/m-K

Thermal Shock Resistance

14 points

Electrical

Electrical Conductivity: Equal Volume

12 % IACS

Electrical Conductivity: Equal Weight (Specific)

65 % IACS

Calculated

Resilience: Ultimate (Unit Rupture Work)

17 MJ/m 3

Resilience: Unit (Modulus of Resilience)

78 kJ/m 3

Stiffness to Weight: Axial

15 points

Stiffness to Weight: Bending

70 points

Strength to Weight: Axial

39 points

Strength to Weight: Bending

50 points

Environmental

Base Metal Price

12 % relative

Embodied Carbon

23 kg CO 2 /kg material

Embodied Energy

160 MJ/kg

Embodied Energy

160 MJ/kg 67 x 10 3 BTU/lb

Embodied Water

990 L/kg

Embodied Water

990 L/kg 120 gal/lb

Registered Designations & Aliases

AZ81A-T4 Magnesium

Standards

ASTM B199 ASTM B199: Standard Specification for Magnesium-Alloy Permanent Mold Castings

ASTM B199 ASTM B199: Standard Specification for Magnesium-Alloy Permanent Mold Castings ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings Welding and Joining of Magnesium Alloys, Liming Liu (editor), 2010 ASTM B80: Standard Specification for Magnesium-Alloy Sand 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

ASTM B403 ASTM B403: Standard Specification for Magnesium-Alloy Investment Castings

ASTM B80 ASTM B80: Standard Specification for Magnesium-Alloy Sand Castings