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ACI-ASTM CB7Cu-1 Steel vs. AM50A Magnesium

ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while AM50A 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 AM50A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
58
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 5.7 to 11
11
Fatigue Strength, MPa 420 to 590
70
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
210
Tensile Strength: Yield (Proof), MPa 760 to 1180
120

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Melting Completion (Liquidus), °C 1430
620
Melting Onset (Solidus), °C 1500
570
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 17
65
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
16
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
88

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 2.6
23
Embodied Energy, MJ/kg 38
160
Embodied Water, L/kg 130
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
19
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
150
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 34 to 48
35
Strength to Weight: Bending, points 28 to 35
47
Thermal Diffusivity, mm2/s 4.6
39
Thermal Shock Resistance, points 32 to 45
13

Alloy Composition

Aluminum (Al), % 0
4.4 to 5.4
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 15.5 to 17.7
0
Copper (Cu), % 2.5 to 3.2
0 to 0.010
Iron (Fe), % 72.3 to 78.4
0 to 0.0040
Magnesium (Mg), % 0
93.7 to 95.3
Manganese (Mn), % 0 to 0.7
0.26 to 0.6
Nickel (Ni), % 3.6 to 4.6
0 to 0.0020
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 0.1
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.22