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AISI 440A Stainless Steel vs. ZE63A Magnesium

AISI 440A stainless steel belongs to the iron alloys classification, while ZE63A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, 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 AISI 440A stainless steel and the bottom bar is ZE63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 5.0 to 20
7.7
Fatigue Strength, MPa 270 to 790
120
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
17
Shear Strength, MPa 450 to 1040
170
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
300
Tensile Strength: Yield (Proof), MPa 420 to 1650
190

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Maximum Temperature: Mechanical, °C 760
170
Melting Completion (Liquidus), °C 1480
510
Melting Onset (Solidus), °C 1370
390
Specific Heat Capacity, J/kg-K 480
950
Thermal Conductivity, W/m-K 23
110
Thermal Expansion, µm/m-K 10
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
31
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
22
Density, g/cm3 7.7
2.0
Embodied Carbon, kg CO2/kg material 2.2
24
Embodied Energy, MJ/kg 31
180
Embodied Water, L/kg 120
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
20
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
58
Strength to Weight: Axial, points 26 to 65
40
Strength to Weight: Bending, points 23 to 43
48
Thermal Diffusivity, mm2/s 6.2
57
Thermal Shock Resistance, points 26 to 65
17

Alloy Composition

Carbon (C), % 0.6 to 0.75
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 78.4 to 83.4
0
Magnesium (Mg), % 0
89.6 to 92
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Unspecified Rare Earths, % 0
2.1 to 3.0
Zinc (Zn), % 0
5.5 to 6.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3