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S17700 Stainless Steel vs. 6065 Aluminum

S17700 stainless steel belongs to the iron alloys classification, while 6065 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 S17700 stainless steel and the bottom bar is 6065 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 1.0 to 23
4.5 to 11
Fatigue Strength, MPa 290 to 560
96 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 740 to 940
190 to 230
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
310 to 400
Tensile Strength: Yield (Proof), MPa 430 to 1210
270 to 380

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 890
180
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 15
170
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
43
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 2.8
8.4
Embodied Energy, MJ/kg 40
150
Embodied Water, L/kg 150
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
17 to 34
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
540 to 1040
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 42 to 59
31 to 40
Strength to Weight: Bending, points 32 to 40
36 to 43
Thermal Diffusivity, mm2/s 4.1
67
Thermal Shock Resistance, points 39 to 54
14 to 18

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
94.4 to 98.2
Bismuth (Bi), % 0
0.5 to 1.5
Carbon (C), % 0 to 0.090
0
Chromium (Cr), % 16 to 18
0 to 0.15
Copper (Cu), % 0
0.15 to 0.4
Iron (Fe), % 70.5 to 76.8
0 to 0.7
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 0 to 1.0
0 to 0.15
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.4 to 0.8
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0 to 0.15
Residuals, % 0
0 to 0.15