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ACI-ASTM CB7Cu-1 Steel vs. AZ63A Magnesium

ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while AZ63A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 ACI-ASTM CB7Cu-1 steel and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
46
Elongation at Break, % 5.7 to 11
2.2 to 8.0
Fatigue Strength, MPa 420 to 590
76 to 83
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
18
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
190 to 270
Tensile Strength: Yield (Proof), MPa 760 to 1180
81 to 120

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Melting Completion (Liquidus), °C 1430
610
Melting Onset (Solidus), °C 1500
450
Specific Heat Capacity, J/kg-K 480
980
Thermal Conductivity, W/m-K 17
52 to 65
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
12 to 15
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
59 to 74

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 2.6
22
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 130
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
3.7 to 16
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
71 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
66
Strength to Weight: Axial, points 34 to 48
29 to 41
Strength to Weight: Bending, points 28 to 35
40 to 51
Thermal Diffusivity, mm2/s 4.6
29 to 37
Thermal Shock Resistance, points 32 to 45
11 to 16

Alloy Composition

Aluminum (Al), % 0
5.3 to 6.7
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 15.5 to 17.7
0
Copper (Cu), % 2.5 to 3.2
0 to 0.25
Iron (Fe), % 72.3 to 78.4
0
Magnesium (Mg), % 0
88.6 to 92.1
Manganese (Mn), % 0 to 0.7
0.15 to 0.35
Nickel (Ni), % 3.6 to 4.6
0 to 0.010
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
2.5 to 3.5
Residuals, % 0
0 to 0.3