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AM60B Magnesium vs. S21900 Stainless Steel

AM60B magnesium belongs to the magnesium alloys classification, while S21900 stainless steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 AM60B magnesium and the bottom bar is S21900 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 62
220
Elastic (Young's, Tensile) Modulus, GPa 45
200
Elongation at Break, % 11
50
Fatigue Strength, MPa 96
380
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 17
78
Shear Strength, MPa 140
510
Tensile Strength: Ultimate (UTS), MPa 230
710
Tensile Strength: Yield (Proof), MPa 130
390

Thermal Properties

Latent Heat of Fusion, J/g 350
290
Maximum Temperature: Mechanical, °C 120
980
Melting Completion (Liquidus), °C 620
1400
Melting Onset (Solidus), °C 540
1350
Specific Heat Capacity, J/kg-K 1000
480
Thermal Conductivity, W/m-K 61
14
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 13
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 72
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 1.7
7.7
Embodied Carbon, kg CO2/kg material 23
3.0
Embodied Energy, MJ/kg 160
43
Embodied Water, L/kg 990
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
300
Resilience: Unit (Modulus of Resilience), kJ/m3 190
380
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 71
25
Strength to Weight: Axial, points 38
26
Strength to Weight: Bending, points 50
23
Thermal Diffusivity, mm2/s 37
3.8
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 5.5 to 6.5
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
19 to 21.5
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
59.4 to 67.4
Magnesium (Mg), % 92.6 to 94.3
0
Manganese (Mn), % 0.24 to 0.6
8.0 to 10
Nickel (Ni), % 0 to 0.0020
5.5 to 7.5
Nitrogen (N), % 0
0.15 to 0.4
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.1
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 0 to 0.22
0