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AZ91A Magnesium vs. EN 1.4923 Stainless Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.4923 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (7, 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 AZ91A magnesium and the bottom bar is EN 1.4923 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
12 to 21
Fatigue Strength, MPa 99
300 to 440
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 140
540 to 590
Tensile Strength: Ultimate (UTS), MPa 240
870 to 980
Tensile Strength: Yield (Proof), MPa 160
470 to 780

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Maximum Temperature: Mechanical, °C 130
740
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 470
1410
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 73
24
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 52
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
8.0
Density, g/cm3 1.7
7.8
Embodied Carbon, kg CO2/kg material 22
2.9
Embodied Energy, MJ/kg 160
41
Embodied Water, L/kg 990
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
110 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
570 to 1580
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
31 to 35
Strength to Weight: Bending, points 49
26 to 28
Thermal Diffusivity, mm2/s 42
6.5
Thermal Shock Resistance, points 14
30 to 34

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.18 to 0.24
Chromium (Cr), % 0
11 to 12.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
83.5 to 87.1
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.4 to 0.9
Molybdenum (Mo), % 0
0.8 to 1.2
Nickel (Ni), % 0 to 0.030
0.3 to 0.8
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Vanadium (V), % 0
0.25 to 0.35
Zinc (Zn), % 0.35 to 1.0
0