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AZ91D Magnesium vs. EN 1.4807 Stainless Steel

AZ91D magnesium belongs to the magnesium alloys classification, while EN 1.4807 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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 1.4807 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
140
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 2.3 to 4.5
4.5
Fatigue Strength, MPa 74 to 85
120
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
75
Tensile Strength: Ultimate (UTS), MPa 160 to 220
480
Tensile Strength: Yield (Proof), MPa 80 to 130
250

Thermal Properties

Latent Heat of Fusion, J/g 350
320
Maximum Temperature: Mechanical, °C 130
1000
Melting Completion (Liquidus), °C 600
1390
Melting Onset (Solidus), °C 490
1350
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 78
12
Thermal Expansion, µm/m-K 27
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 58
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
39
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 22
6.8
Embodied Energy, MJ/kg 160
97
Embodied Water, L/kg 990
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
18
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
160
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 26 to 34
17
Strength to Weight: Bending, points 38 to 46
17
Thermal Diffusivity, mm2/s 45
3.2
Thermal Shock Resistance, points 9.5 to 13
12

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.3 to 0.5
Chromium (Cr), % 0
17 to 20
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.0050
36.6 to 46.7
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.0020
34 to 36
Niobium (Nb), % 0
1.0 to 1.8
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0