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AZ91A Magnesium vs. EN 1.4547 Stainless Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.4547 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (5, 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 1.4547 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
230
Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 5.0
39
Fatigue Strength, MPa 99
290
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
80
Shear Strength, MPa 140
510
Tensile Strength: Ultimate (UTS), MPa 240
750
Tensile Strength: Yield (Proof), MPa 160
340

Thermal Properties

Latent Heat of Fusion, J/g 360
300
Maximum Temperature: Mechanical, °C 130
1090
Melting Completion (Liquidus), °C 600
1470
Melting Onset (Solidus), °C 470
1420
Specific Heat Capacity, J/kg-K 990
460
Thermal Conductivity, W/m-K 73
14
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 52
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 22
5.6
Embodied Energy, MJ/kg 160
75
Embodied Water, L/kg 990
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
240
Resilience: Unit (Modulus of Resilience), kJ/m3 280
290
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
26
Strength to Weight: Bending, points 49
23
Thermal Diffusivity, mm2/s 42
3.8
Thermal Shock Resistance, points 14
16

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
19.5 to 20.5
Copper (Cu), % 0 to 0.1
0.5 to 1.0
Iron (Fe), % 0
51 to 56.3
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0 to 0.030
17.5 to 18.5
Nitrogen (N), % 0
0.18 to 0.25
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.7
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 0.35 to 1.0
0