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AZ91B Magnesium vs. EN 1.4864 Stainless Steel

AZ91B magnesium belongs to the magnesium alloys classification, while EN 1.4864 stainless steel belongs to the iron alloys. There are 31 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 AZ91B magnesium and the bottom bar is EN 1.4864 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
190
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
33
Fatigue Strength, MPa 79
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
75
Shear Strength, MPa 140
430
Tensile Strength: Ultimate (UTS), MPa 240
650
Tensile Strength: Yield (Proof), MPa 160
260

Thermal Properties

Latent Heat of Fusion, J/g 360
310
Maximum Temperature: Mechanical, °C 130
1100
Melting Completion (Liquidus), °C 600
1390
Melting Onset (Solidus), °C 470
1340
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 73
13
Thermal Expansion, µm/m-K 26
14

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
30
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 22
5.3
Embodied Energy, MJ/kg 160
75
Embodied Water, L/kg 990
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
170
Resilience: Unit (Modulus of Resilience), kJ/m3 280
170
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
23
Strength to Weight: Bending, points 49
21
Thermal Diffusivity, mm2/s 42
3.3
Thermal Shock Resistance, points 14
17

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
15 to 17
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
41.7 to 51
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 2.0
Nickel (Ni), % 0 to 0.030
33 to 37
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.5
1.0 to 2.0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.35 to 1.0
0