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S20910 Stainless Steel vs. EN AC-42000 Aluminum

S20910 stainless steel belongs to the iron alloys classification, while EN AC-42000 aluminum belongs to the aluminum alloys. There are 28 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 S20910 stainless steel and the bottom bar is EN AC-42000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230 to 290
59 to 91
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 14 to 39
1.1 to 2.4
Fatigue Strength, MPa 310 to 460
67 to 76
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Tensile Strength: Ultimate (UTS), MPa 780 to 940
170 to 270
Tensile Strength: Yield (Proof), MPa 430 to 810
95 to 230

Thermal Properties

Latent Heat of Fusion, J/g 300
500
Maximum Temperature: Mechanical, °C 1080
170
Melting Completion (Liquidus), °C 1420
610
Melting Onset (Solidus), °C 1380
600
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 13
160
Thermal Expansion, µm/m-K 16
22

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.5
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 4.8
8.0
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
2.8 to 5.7
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
64 to 370
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 28 to 33
18 to 28
Strength to Weight: Bending, points 24 to 27
26 to 35
Thermal Diffusivity, mm2/s 3.6
66
Thermal Shock Resistance, points 17 to 21
7.9 to 12

Alloy Composition

Aluminum (Al), % 0
89.9 to 93.3
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 52.1 to 62.1
0 to 0.55
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.2 to 0.65
Manganese (Mn), % 4.0 to 6.0
0 to 0.35
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0 to 0.15
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.75
6.5 to 7.5
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15