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ZE63A Magnesium vs. SAE-AISI 4620 Steel

ZE63A magnesium belongs to the magnesium alloys classification, while SAE-AISI 4620 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 ZE63A magnesium and the bottom bar is SAE-AISI 4620 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 73
150 to 210
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 7.7
16 to 27
Fatigue Strength, MPa 120
260 to 360
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
73
Shear Strength, MPa 170
320 to 420
Tensile Strength: Ultimate (UTS), MPa 300
490 to 680
Tensile Strength: Yield (Proof), MPa 190
350 to 550

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 510
1460
Melting Onset (Solidus), °C 390
1420
Specific Heat Capacity, J/kg-K 950
470
Thermal Conductivity, W/m-K 110
47
Thermal Expansion, µm/m-K 27
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 22
3.2
Density, g/cm3 2.0
7.9
Embodied Carbon, kg CO2/kg material 24
1.6
Embodied Energy, MJ/kg 180
22
Embodied Water, L/kg 920
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
100 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 400
330 to 800
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 58
24
Strength to Weight: Axial, points 40
17 to 24
Strength to Weight: Bending, points 48
18 to 22
Thermal Diffusivity, mm2/s 57
13
Thermal Shock Resistance, points 17
15 to 20

Alloy Composition

Carbon (C), % 0
0.17 to 0.22
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
96.4 to 97.4
Magnesium (Mg), % 89.6 to 92
0
Manganese (Mn), % 0
0.45 to 0.65
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0 to 0.010
1.7 to 2.0
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Unspecified Rare Earths, % 2.1 to 3.0
0
Zinc (Zn), % 5.5 to 6.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0