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ACI-ASTM CB7Cu-1 Steel vs. ZK51A Magnesium

ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while ZK51A 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 ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 5.7 to 11
4.7
Fatigue Strength, MPa 420 to 590
62
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
18
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
240
Tensile Strength: Yield (Proof), MPa 760 to 1180
150

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Melting Completion (Liquidus), °C 1430
640
Melting Onset (Solidus), °C 1500
550
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 17
110
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
28
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
13
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 2.6
24
Embodied Energy, MJ/kg 38
160
Embodied Water, L/kg 130
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
10
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
64
Strength to Weight: Axial, points 34 to 48
36
Strength to Weight: Bending, points 28 to 35
47
Thermal Diffusivity, mm2/s 4.6
61
Thermal Shock Resistance, points 32 to 45
15

Alloy Composition

Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 15.5 to 17.7
0
Copper (Cu), % 2.5 to 3.2
0 to 0.1
Iron (Fe), % 72.3 to 78.4
0
Magnesium (Mg), % 0
93.1 to 95.9
Manganese (Mn), % 0 to 0.7
0
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
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3