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ACI-ASTM CA15M Steel vs. AM60B Magnesium

ACI-ASTM CA15M steel belongs to the iron alloys classification, while AM60B magnesium belongs to the magnesium alloys. There are 30 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 CA15M steel and the bottom bar is AM60B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
62
Elastic (Young's, Tensile) Modulus, GPa 200
45
Elongation at Break, % 20
11
Fatigue Strength, MPa 330
96
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
17
Tensile Strength: Ultimate (UTS), MPa 690
230
Tensile Strength: Yield (Proof), MPa 510
130

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 760
120
Melting Completion (Liquidus), °C 1450
620
Melting Onset (Solidus), °C 1410
540
Specific Heat Capacity, J/kg-K 480
1000
Thermal Conductivity, W/m-K 27
61
Thermal Expansion, µm/m-K 10
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
13
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
72

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
12
Density, g/cm3 7.8
1.7
Embodied Carbon, kg CO2/kg material 2.1
23
Embodied Energy, MJ/kg 29
160
Embodied Water, L/kg 100
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
21
Resilience: Unit (Modulus of Resilience), kJ/m3 670
190
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
71
Strength to Weight: Axial, points 25
38
Strength to Weight: Bending, points 22
50
Thermal Diffusivity, mm2/s 7.2
37
Thermal Shock Resistance, points 25
14

Alloy Composition

Aluminum (Al), % 0
5.5 to 6.5
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 11.5 to 14
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 82.1 to 88.4
0 to 0.0050
Magnesium (Mg), % 0
92.6 to 94.3
Manganese (Mn), % 0 to 1.0
0.24 to 0.6
Molybdenum (Mo), % 0.15 to 1.0
0
Nickel (Ni), % 0 to 1.0
0 to 0.0020
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.65
0 to 0.1
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.22