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ZC63A Magnesium vs. SAE-AISI 81B45 Steel

ZC63A magnesium belongs to the magnesium alloys classification, while SAE-AISI 81B45 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 ZC63A magnesium and the bottom bar is SAE-AISI 81B45 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60
160 to 200
Elastic (Young's, Tensile) Modulus, GPa 48
190
Elongation at Break, % 3.3
12 to 24
Fatigue Strength, MPa 94
250 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 19
73
Shear Strength, MPa 130
340 to 400
Tensile Strength: Ultimate (UTS), MPa 220
540 to 670
Tensile Strength: Yield (Proof), MPa 130
350 to 560

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 98
410
Melting Completion (Liquidus), °C 550
1460
Melting Onset (Solidus), °C 470
1420
Specific Heat Capacity, J/kg-K 950
470
Thermal Conductivity, W/m-K 120
40
Thermal Expansion, µm/m-K 26
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.3
Density, g/cm3 2.1
7.8
Embodied Carbon, kg CO2/kg material 22
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 920
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
77 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 190
320 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 58
24
Strength to Weight: Axial, points 29
19 to 24
Strength to Weight: Bending, points 38
19 to 22
Thermal Diffusivity, mm2/s 58
11
Thermal Shock Resistance, points 12
17 to 21

Alloy Composition


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Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0
0.43 to 0.48
Chromium (Cr), % 0
0.35 to 0.55
Copper (Cu), % 2.4 to 3.0
0
Iron (Fe), % 0
97 to 98
Magnesium (Mg), % 89.2 to 91.9
0
Manganese (Mn), % 0.25 to 0.75
0.75 to 1.0
Molybdenum (Mo), % 0
0.080 to 0.15
Nickel (Ni), % 0 to 0.010
0.2 to 0.4
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.2
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 5.5 to 6.5
0
Residuals, % 0 to 0.3
0