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AZ91D Magnesium vs. EN 1.4537 Stainless Steel

AZ91D magnesium belongs to the magnesium alloys classification, while EN 1.4537 stainless steel belongs to the iron alloys. There are 32 material properties with values for both materials. Properties with values for just one material (4, 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 1.4537 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
220
Elastic (Young's, Tensile) Modulus, GPa 46
210
Elongation at Break, % 2.3 to 4.5
42
Fatigue Strength, MPa 74 to 85
290
Impact Strength: V-Notched Charpy, J 2.7
91
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
80
Shear Strength, MPa 120 to 140
480
Tensile Strength: Ultimate (UTS), MPa 160 to 220
700
Tensile Strength: Yield (Proof), MPa 80 to 130
330

Thermal Properties

Latent Heat of Fusion, J/g 350
310
Maximum Temperature: Mechanical, °C 130
1100
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 490
1390
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 78
14
Thermal Expansion, µm/m-K 27
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 58
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
34
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 22
6.1
Embodied Energy, MJ/kg 160
84
Embodied Water, L/kg 990
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
240
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
270
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 26 to 34
24
Strength to Weight: Bending, points 38 to 46
22
Thermal Diffusivity, mm2/s 45
3.7
Thermal Shock Resistance, points 9.5 to 13
15

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 0 to 0.030
1.0 to 2.0
Iron (Fe), % 0 to 0.0050
36.3 to 46.1
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 2.0
Molybdenum (Mo), % 0
4.7 to 5.7
Nickel (Ni), % 0 to 0.0020
24 to 27
Nitrogen (N), % 0
0.17 to 0.25
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0 to 0.7
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0.35 to 1.0
0