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AZ91B Magnesium vs. EN 1.4313 Stainless Steel

AZ91B magnesium belongs to the magnesium alloys classification, while EN 1.4313 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 AZ91B magnesium and the bottom bar is EN 1.4313 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
12 to 17
Fatigue Strength, MPa 79
340 to 510
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 140
460 to 600
Tensile Strength: Ultimate (UTS), MPa 240
750 to 1000
Tensile Strength: Yield (Proof), MPa 160
580 to 910

Thermal Properties

Latent Heat of Fusion, J/g 360
280
Maximum Temperature: Mechanical, °C 130
780
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 470
1400
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 73
25
Thermal Expansion, µm/m-K 26
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 58
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 22
2.4
Embodied Energy, MJ/kg 160
34
Embodied Water, L/kg 990
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
110 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
870 to 2100
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
27 to 36
Strength to Weight: Bending, points 49
23 to 28
Thermal Diffusivity, mm2/s 42
6.7
Thermal Shock Resistance, points 14
27 to 36

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
78.5 to 84.2
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.5
Molybdenum (Mo), % 0
0.3 to 0.7
Nickel (Ni), % 0 to 0.030
3.5 to 4.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.35 to 1.0
0