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S20910 Stainless Steel vs. 4006 Aluminum

S20910 stainless steel belongs to the iron alloys classification, while 4006 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 4006 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230 to 290
28 to 45
Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 14 to 39
3.4 to 24
Fatigue Strength, MPa 310 to 460
35 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Shear Strength, MPa 500 to 570
70 to 91
Tensile Strength: Ultimate (UTS), MPa 780 to 940
110 to 160
Tensile Strength: Yield (Proof), MPa 430 to 810
62 to 140

Thermal Properties

Latent Heat of Fusion, J/g 300
410
Maximum Temperature: Mechanical, °C 1080
160
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
620
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 13
220
Thermal Expansion, µm/m-K 16
23

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.0
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 4.8
8.1
Embodied Energy, MJ/kg 68
150
Embodied Water, L/kg 180
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
5.1 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
28 to 130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 28 to 33
11 to 16
Strength to Weight: Bending, points 24 to 27
19 to 24
Thermal Diffusivity, mm2/s 3.6
89
Thermal Shock Resistance, points 17 to 21
4.9 to 7.0

Alloy Composition

Aluminum (Al), % 0
97.4 to 98.7
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0 to 0.2
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 52.1 to 62.1
0.5 to 0.8
Magnesium (Mg), % 0
0 to 0.010
Manganese (Mn), % 4.0 to 6.0
0 to 0.050
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
0
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
0.8 to 1.2
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.1 to 0.3
0
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.15

Comparable Variants