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AZ91B Magnesium vs. EN 1.4710 Stainless Steel

AZ91B magnesium belongs to the magnesium alloys classification, while EN 1.4710 stainless steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (13, 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 1.4710 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
260
Elastic (Young's, Tensile) Modulus, GPa 46
190
Elongation at Break, % 5.0
20
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
74

Thermal Properties

Latent Heat of Fusion, J/g 360
290
Maximum Temperature: Mechanical, °C 130
750
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 470
1390
Specific Heat Capacity, J/kg-K 990
480
Thermal Conductivity, W/m-K 73
24
Thermal Expansion, µm/m-K 26
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
6.4
Electrical Conductivity: Equal Weight (Specific), % IACS 58
7.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
5.0
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 22
1.8
Embodied Energy, MJ/kg 160
24
Embodied Water, L/kg 990
76

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Thermal Diffusivity, mm2/s 42
6.5

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0.2 to 0.35
Chromium (Cr), % 0
6.0 to 8.0
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
87.4 to 92.3
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0.5 to 1.0
Molybdenum (Mo), % 0
0 to 0.15
Nickel (Ni), % 0 to 0.030
0 to 0.5
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.5
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0.35 to 1.0
0