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6061 Aluminum vs. S20910 Stainless Steel

6061 aluminum belongs to the aluminum alloys classification, while S20910 stainless steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, 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 6061 aluminum and the bottom bar is S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 3.4 to 20
14 to 39
Fatigue Strength, MPa 58 to 110
310 to 460
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
79
Shear Strength, MPa 84 to 210
500 to 570
Tensile Strength: Ultimate (UTS), MPa 130 to 410
780 to 940
Tensile Strength: Yield (Proof), MPa 76 to 370
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 170
1080
Melting Completion (Liquidus), °C 650
1420
Melting Onset (Solidus), °C 580
1380
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 170
13
Thermal Expansion, µm/m-K 24
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
22
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
4.8
Embodied Energy, MJ/kg 150
68
Embodied Water, L/kg 1180
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.8 to 81
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 42 to 1000
460 to 1640
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 13 to 42
28 to 33
Strength to Weight: Bending, points 21 to 45
24 to 27
Thermal Diffusivity, mm2/s 68
3.6
Thermal Shock Resistance, points 5.7 to 18
17 to 21

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
0
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0.040 to 0.35
20.5 to 23.5
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.7
52.1 to 62.1
Magnesium (Mg), % 0.8 to 1.2
0
Manganese (Mn), % 0 to 0.15
4.0 to 6.0
Molybdenum (Mo), % 0
1.5 to 3.0
Nickel (Ni), % 0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.4 to 0.8
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Vanadium (V), % 0
0.1 to 0.3
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0

Comparable Variants