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ACI-ASTM CG6MMN Steel vs. AZ63A Magnesium

ACI-ASTM CG6MMN steel belongs to the iron alloys classification, while AZ63A magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (9, 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 CG6MMN steel and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 34
2.2 to 8.0
Fatigue Strength, MPa 260
76 to 83
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
18
Tensile Strength: Ultimate (UTS), MPa 670
190 to 270
Tensile Strength: Yield (Proof), MPa 320
81 to 120

Thermal Properties

Latent Heat of Fusion, J/g 300
350
Maximum Temperature: Mechanical, °C 1080
120
Melting Completion (Liquidus), °C 1420
610
Melting Onset (Solidus), °C 1380
450
Specific Heat Capacity, J/kg-K 480
980
Thermal Expansion, µm/m-K 17
26

Otherwise Unclassified Properties

Base Metal Price, % relative 22
12
Density, g/cm3 7.8
1.8
Embodied Carbon, kg CO2/kg material 4.8
22
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
3.7 to 16
Resilience: Unit (Modulus of Resilience), kJ/m3 260
71 to 160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
66
Strength to Weight: Axial, points 24
29 to 41
Strength to Weight: Bending, points 22
40 to 51
Thermal Shock Resistance, points 14
11 to 16

Alloy Composition

Aluminum (Al), % 0
5.3 to 6.7
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 51.9 to 62.1
0
Magnesium (Mg), % 0
88.6 to 92.1
Manganese (Mn), % 4.0 to 6.0
0.15 to 0.35
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0 to 0.010
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
2.5 to 3.5
Residuals, % 0
0 to 0.3