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AZ91B Magnesium vs. EN 1.4980 Stainless Steel

AZ91B magnesium belongs to the magnesium alloys classification, while EN 1.4980 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (6, 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 1.4980 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
17
Fatigue Strength, MPa 79
410
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
75
Shear Strength, MPa 140
630
Tensile Strength: Ultimate (UTS), MPa 240
1030
Tensile Strength: Yield (Proof), MPa 160
680

Thermal Properties

Latent Heat of Fusion, J/g 360
300
Maximum Temperature: Mechanical, °C 130
920
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 470
1380
Specific Heat Capacity, J/kg-K 990
470
Thermal Conductivity, W/m-K 73
13
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 58
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
6.0
Embodied Energy, MJ/kg 160
87
Embodied Water, L/kg 990
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
1180
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 38
36
Strength to Weight: Bending, points 49
28
Thermal Diffusivity, mm2/s 42
3.5
Thermal Shock Resistance, points 14
22

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.35
Boron (B), % 0
0.0030 to 0.010
Carbon (C), % 0
0.030 to 0.080
Chromium (Cr), % 0
13.5 to 16
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
49.2 to 58.5
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
1.0 to 2.0
Molybdenum (Mo), % 0
1.0 to 1.5
Nickel (Ni), % 0 to 0.030
24 to 27
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
1.9 to 2.3
Vanadium (V), % 0
0.1 to 0.5
Zinc (Zn), % 0.35 to 1.0
0