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ZK40A Magnesium vs. AISI 316N Stainless Steel

ZK40A magnesium belongs to the magnesium alloys classification, while AISI 316N stainless steel belongs to the iron alloys. There are 30 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 ZK40A magnesium and the bottom bar is AISI 316N stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 4.2
9.0 to 39
Fatigue Strength, MPa 190
230 to 450
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
78
Shear Strength, MPa 160
420 to 690
Tensile Strength: Ultimate (UTS), MPa 280
620 to 1160
Tensile Strength: Yield (Proof), MPa 260
270 to 870

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Mechanical, °C 120
940
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 540
1400
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
15
Thermal Expansion, µm/m-K 26
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
19
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 24
3.9
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 950
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
95 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 740
180 to 1880
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 65
25
Strength to Weight: Axial, points 43
22 to 41
Strength to Weight: Bending, points 53
20 to 31
Thermal Diffusivity, mm2/s 62
4.1
Thermal Shock Resistance, points 17
14 to 26

Alloy Composition

Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
16 to 18
Iron (Fe), % 0
61.9 to 71.9
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
10 to 14
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0