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ACI-ASTM CB7Cu-1 Steel vs. AS41A Magnesium

ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while AS41A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 AS41A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 5.7 to 11
11
Fatigue Strength, MPa 420 to 590
100
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
230
Tensile Strength: Yield (Proof), MPa 760 to 1180
140

Thermal Properties

Latent Heat of Fusion, J/g 280
370
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
68
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
17
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
92

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.8
1.6
Embodied Carbon, kg CO2/kg material 2.6
23
Embodied Energy, MJ/kg 38
160
Embodied Water, L/kg 130
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
21
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
220
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
72
Strength to Weight: Axial, points 34 to 48
38
Strength to Weight: Bending, points 28 to 35
50
Thermal Diffusivity, mm2/s 4.6
41
Thermal Shock Resistance, points 32 to 45
14

Alloy Composition

Aluminum (Al), % 0
3.5 to 5.0
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 15.5 to 17.7
0
Copper (Cu), % 2.5 to 3.2
0 to 0.060
Iron (Fe), % 72.3 to 78.4
0
Magnesium (Mg), % 0
92.8 to 95.8
Manganese (Mn), % 0 to 0.7
0.2 to 0.5
Nickel (Ni), % 3.6 to 4.6
0 to 0.030
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
0.5 to 1.5
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.12