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AZ91D Magnesium vs. EN 1.4415 Stainless Steel

AZ91D magnesium belongs to the magnesium alloys classification, while EN 1.4415 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, 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 AZ91D magnesium and the bottom bar is EN 1.4415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 2.3 to 4.5
17 to 20
Fatigue Strength, MPa 74 to 85
470 to 510
Impact Strength: V-Notched Charpy, J 2.7
91 to 110
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 120 to 140
520 to 570
Tensile Strength: Ultimate (UTS), MPa 160 to 220
830 to 930
Tensile Strength: Yield (Proof), MPa 80 to 130
730 to 840

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 130
790
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 490
1420
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 78
19
Thermal Expansion, µm/m-K 27
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 58
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
3.6
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
150 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
1350 to 1790
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 26 to 34
29 to 33
Strength to Weight: Bending, points 38 to 46
25 to 27
Thermal Diffusivity, mm2/s 45
5.1
Thermal Shock Resistance, points 9.5 to 13
30 to 34

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
11.5 to 13.5
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.0050
75.9 to 82.4
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 0.5
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0 to 0.0020
4.5 to 6.5
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0
0.1 to 0.5
Zinc (Zn), % 0.35 to 1.0
0

Comparable Variants