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SAE-AISI 1045 Steel vs. ZC63A Magnesium

SAE-AISI 1045 steel belongs to the iron alloys classification, while ZC63A magnesium belongs to the magnesium alloys. There are 31 material properties with values for both materials. Properties with values for just one material (2, 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 SAE-AISI 1045 steel and the bottom bar is ZC63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
60
Elastic (Young's, Tensile) Modulus, GPa 190
48
Elongation at Break, % 13 to 18
3.3
Fatigue Strength, MPa 220 to 370
94
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
19
Shear Strength, MPa 380 to 410
130
Tensile Strength: Ultimate (UTS), MPa 620 to 680
220
Tensile Strength: Yield (Proof), MPa 330 to 580
130

Thermal Properties

Latent Heat of Fusion, J/g 250
330
Maximum Temperature: Mechanical, °C 400
98
Melting Completion (Liquidus), °C 1460
550
Melting Onset (Solidus), °C 1420
470
Specific Heat Capacity, J/kg-K 470
950
Thermal Conductivity, W/m-K 51
120
Thermal Expansion, µm/m-K 12
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
32
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
140

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
13
Density, g/cm3 7.8
2.1
Embodied Carbon, kg CO2/kg material 1.4
22
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 46
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 93
6.3
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 900
190
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
58
Strength to Weight: Axial, points 22 to 24
29
Strength to Weight: Bending, points 21 to 22
38
Thermal Diffusivity, mm2/s 14
58
Thermal Shock Resistance, points 20 to 22
12

Alloy Composition

Carbon (C), % 0.43 to 0.5
0
Copper (Cu), % 0
2.4 to 3.0
Iron (Fe), % 98.5 to 99
0
Magnesium (Mg), % 0
89.2 to 91.9
Manganese (Mn), % 0.6 to 0.9
0.25 to 0.75
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0
0 to 0.2
Sulfur (S), % 0 to 0.050
0
Zinc (Zn), % 0
5.5 to 6.5
Residuals, % 0
0 to 0.3