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ASTM A228 Music Wire vs. ISO-WD32250 Magnesium

ASTM A228 music wire belongs to the iron alloys classification, while ISO-WD32250 magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A228 music wire and the bottom bar is ISO-WD32250 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 12
4.5 to 8.6
Fatigue Strength, MPa 1280
170 to 210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
17
Shear Strength, MPa 1470
180 to 190
Tensile Strength: Ultimate (UTS), MPa 2450
310 to 330
Tensile Strength: Yield (Proof), MPa 2050
240 to 290

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 400
120
Melting Completion (Liquidus), °C 1450
600
Melting Onset (Solidus), °C 1410
550
Specific Heat Capacity, J/kg-K 470
980
Thermal Conductivity, W/m-K 49
130
Thermal Expansion, µm/m-K 12
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
25
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
130

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
13
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 1.4
24
Embodied Energy, MJ/kg 19
160
Embodied Water, L/kg 45
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 280
14 to 26
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
67
Strength to Weight: Axial, points 87
49 to 51
Strength to Weight: Bending, points 52
58 to 60
Thermal Diffusivity, mm2/s 13
72
Thermal Shock Resistance, points 79
19 to 20

Alloy Composition

Carbon (C), % 0.7 to 1.0
0
Iron (Fe), % 98 to 99
0
Magnesium (Mg), % 0
94.9 to 97.1
Manganese (Mn), % 0.2 to 0.6
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0.1 to 0.3
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
2.5 to 4.0
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3