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AZ91A Magnesium vs. EN 1.4034 Stainless Steel

AZ91A magnesium belongs to the magnesium alloys classification, while EN 1.4034 stainless steel belongs to the iron alloys. There are 30 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 1.4034 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
11 to 14
Fatigue Strength, MPa 99
230 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 140
420 to 540
Tensile Strength: Ultimate (UTS), MPa 240
690 to 900
Tensile Strength: Yield (Proof), MPa 160
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Maximum Temperature: Mechanical, °C 130
770
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 470
1390
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 73
30
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 52
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 22
2.0
Embodied Energy, MJ/kg 160
27
Embodied Water, L/kg 990
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
81 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 280
400 to 1370
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
25 to 32
Strength to Weight: Bending, points 49
22 to 27
Thermal Diffusivity, mm2/s 42
8.1
Thermal Shock Resistance, points 14
24 to 32

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.43 to 0.5
Chromium (Cr), % 0
12.5 to 14.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0
83 to 87.1
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0.35 to 1.0
0