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AZ80A Magnesium vs. EN 1.4959 Stainless Steel

AZ80A magnesium belongs to the magnesium alloys classification, while EN 1.4959 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 AZ80A magnesium and the bottom bar is EN 1.4959 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 3.9 to 8.5
40
Fatigue Strength, MPa 140 to 170
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
77
Shear Strength, MPa 160 to 190
430
Tensile Strength: Ultimate (UTS), MPa 320 to 340
630
Tensile Strength: Yield (Proof), MPa 210 to 230
190

Thermal Properties

Latent Heat of Fusion, J/g 350
300
Maximum Temperature: Mechanical, °C 130
1090
Melting Completion (Liquidus), °C 600
1400
Melting Onset (Solidus), °C 490
1350
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 77
12
Thermal Expansion, µm/m-K 26
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 59
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 23
5.4
Embodied Energy, MJ/kg 160
76
Embodied Water, L/kg 990
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 24
190
Resilience: Unit (Modulus of Resilience), kJ/m3 500 to 600
96
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 51 to 55
22
Strength to Weight: Bending, points 60 to 63
20
Thermal Diffusivity, mm2/s 45
3.2
Thermal Shock Resistance, points 19 to 20
15

Alloy Composition

Aluminum (Al), % 7.8 to 9.2
0.25 to 0.65
Carbon (C), % 0
0.050 to 0.1
Chromium (Cr), % 0
19 to 22
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0 to 0.050
0 to 0.5
Iron (Fe), % 0 to 0.0050
39.4 to 50.5
Magnesium (Mg), % 89 to 91.9
0
Manganese (Mn), % 0.12 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.0050
30 to 34
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.1
0 to 0.7
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0.25 to 0.65
Zinc (Zn), % 0.2 to 0.8
0
Residuals, % 0 to 0.3
0