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AM60A Magnesium vs. ACI-ASTM CB30 Steel

AM60A magnesium belongs to the magnesium alloys classification, while ACI-ASTM CB30 steel belongs to the iron alloys. There are 27 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 AM60A magnesium and the bottom bar is ACI-ASTM CB30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62
210
Elastic (Young's, Tensile) Modulus, GPa 45
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Tensile Strength: Ultimate (UTS), MPa 230
500
Tensile Strength: Yield (Proof), MPa 130
230

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 120
940
Melting Completion (Liquidus), °C 620
1430
Melting Onset (Solidus), °C 550
1380
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 62
21
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 69
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 23
2.3
Embodied Energy, MJ/kg 160
33
Embodied Water, L/kg 990
130

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 190
140
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 37
18
Strength to Weight: Bending, points 49
18
Thermal Diffusivity, mm2/s 37
5.6
Thermal Shock Resistance, points 14
17

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0
0 to 0.3
Chromium (Cr), % 0
18 to 21
Copper (Cu), % 0 to 0.35
0 to 1.2
Iron (Fe), % 0
72.9 to 82
Magnesium (Mg), % 91.8 to 94.4
0
Manganese (Mn), % 0.13 to 0.6
0 to 1.0
Nickel (Ni), % 0 to 0.030
0 to 2.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.22
0