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AZ91D Magnesium vs. S46910 Stainless Steel

AZ91D magnesium belongs to the magnesium alloys classification, while S46910 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (10, 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 AZ91D magnesium and the bottom bar is S46910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
270 to 630
Elastic (Young's, Tensile) Modulus, GPa 46
200
Elongation at Break, % 2.3 to 4.5
2.2 to 11
Fatigue Strength, MPa 74 to 85
250 to 1020
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
76
Shear Strength, MPa 120 to 140
410 to 1410
Tensile Strength: Ultimate (UTS), MPa 160 to 220
680 to 2470
Tensile Strength: Yield (Proof), MPa 80 to 130
450 to 2290

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Maximum Temperature: Mechanical, °C 130
810
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 490
1420
Specific Heat Capacity, J/kg-K 990
470
Thermal Expansion, µm/m-K 27
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
18
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
4.1
Embodied Energy, MJ/kg 160
55
Embodied Water, L/kg 990
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
48 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
510 to 4780
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
24
Strength to Weight: Axial, points 26 to 34
24 to 86
Strength to Weight: Bending, points 38 to 46
22 to 51
Thermal Shock Resistance, points 9.5 to 13
23 to 84

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0.15 to 0.5
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
11 to 13
Copper (Cu), % 0 to 0.030
1.5 to 3.5
Iron (Fe), % 0 to 0.0050
65 to 76
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
3.0 to 5.0
Nickel (Ni), % 0 to 0.0020
8.0 to 10
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0 to 0.7
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0.5 to 1.2
Zinc (Zn), % 0.35 to 1.0
0

Comparable Variants