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AZ91B Magnesium vs. EN 1.4530 Stainless Steel

AZ91B magnesium belongs to the magnesium alloys classification, while EN 1.4530 stainless steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (15, 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 1.4530 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Tensile Strength: Ultimate (UTS), MPa 240
1030 to 1370

Thermal Properties

Latent Heat of Fusion, J/g 360
270
Maximum Temperature: Mechanical, °C 130
790
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 470
1410
Specific Heat Capacity, J/kg-K 990
470
Thermal Expansion, µm/m-K 26
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
3.4
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 990
130

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 38
36 to 48
Strength to Weight: Bending, points 49
29 to 35
Thermal Shock Resistance, points 14
35 to 47

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0.6 to 0.8
Carbon (C), % 0
0 to 0.015
Chromium (Cr), % 0
11.5 to 12.5
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 0
74.4 to 77.3
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 0.1
Molybdenum (Mo), % 0
1.9 to 2.2
Nickel (Ni), % 0 to 0.030
8.5 to 9.5
Nitrogen (N), % 0
0 to 0.010
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0 to 0.5
0 to 0.1
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0
0.28 to 0.37
Zinc (Zn), % 0.35 to 1.0
0