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AZ91A Magnesium vs. ASTM A228 Music Wire

AZ91A magnesium belongs to the magnesium alloys classification, while ASTM A228 music wire belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is ASTM A228 music wire.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
710
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
12
Fatigue Strength, MPa 99
1280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
72
Shear Strength, MPa 140
1470
Tensile Strength: Ultimate (UTS), MPa 240
2450
Tensile Strength: Yield (Proof), MPa 160
2050

Thermal Properties

Latent Heat of Fusion, J/g 360
250
Maximum Temperature: Mechanical, °C 130
400
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 470
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
49
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 52
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.8
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 22
1.4
Embodied Energy, MJ/kg 160
19
Embodied Water, L/kg 990
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
280
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
87
Strength to Weight: Bending, points 49
52
Thermal Diffusivity, mm2/s 42
13
Thermal Shock Resistance, points 14
79

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.7 to 1.0
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
98 to 99
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.2 to 0.6
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.5
0.1 to 0.3
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0