MakeItFrom.com
Menu (ESC)

7020 Aluminum vs. ASTM A228 Music Wire

7020 aluminum belongs to the aluminum 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 (1, 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 7020 aluminum and the bottom bar is ASTM A228 music wire.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 45 to 100
710
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 8.4 to 14
12
Fatigue Strength, MPa 110 to 130
1280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
72
Shear Strength, MPa 110 to 230
1470
Tensile Strength: Ultimate (UTS), MPa 190 to 390
2450
Tensile Strength: Yield (Proof), MPa 120 to 310
2050

Thermal Properties

Latent Heat of Fusion, J/g 380
250
Maximum Temperature: Mechanical, °C 210
400
Melting Completion (Liquidus), °C 650
1450
Melting Onset (Solidus), °C 610
1410
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 150
49
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.9
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1150
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18 to 37
87
Strength to Weight: Bending, points 25 to 41
52
Thermal Diffusivity, mm2/s 59
13
Thermal Shock Resistance, points 8.3 to 17
79

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
0
Carbon (C), % 0
0.7 to 1.0
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.4
98 to 99
Magnesium (Mg), % 1.0 to 1.4
0
Manganese (Mn), % 0.050 to 0.5
0.2 to 0.6
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.35
0.1 to 0.3
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0 to 0.15
0