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ACI-ASTM CB7Cu-1 Steel vs. EN-MC65120 Magnesium

ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while EN-MC65120 magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 EN-MC65120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
55
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 5.7 to 11
3.1
Fatigue Strength, MPa 420 to 590
80
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
160
Tensile Strength: Yield (Proof), MPa 760 to 1180
110

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Melting Completion (Liquidus), °C 1430
590
Melting Onset (Solidus), °C 1500
520
Specific Heat Capacity, J/kg-K 480
970
Thermal Conductivity, W/m-K 17
100
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
25
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
120

Otherwise Unclassified Properties

Base Metal Price, % relative 13
25
Density, g/cm3 7.8
1.9
Embodied Carbon, kg CO2/kg material 2.6
25
Embodied Energy, MJ/kg 38
190
Embodied Water, L/kg 130
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
4.4
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
140
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
62
Strength to Weight: Axial, points 34 to 48
23
Strength to Weight: Bending, points 28 to 35
34
Thermal Diffusivity, mm2/s 4.6
56
Thermal Shock Resistance, points 32 to 45
9.8

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 0.030
Iron (Fe), % 72.3 to 78.4
0 to 0.010
Magnesium (Mg), % 0
91.8 to 95.1
Manganese (Mn), % 0 to 0.7
0 to 0.15
Nickel (Ni), % 3.6 to 4.6
0 to 0.0050
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 0.010
Sulfur (S), % 0 to 0.030
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0
2.0 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.010