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1235 Aluminum vs. S66286 Stainless Steel

1235 aluminum belongs to the aluminum alloys classification, while S66286 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 1235 aluminum and the bottom bar is S66286 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 28 to 34
17 to 40
Fatigue Strength, MPa 23 to 58
240 to 410
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
75
Shear Strength, MPa 52 to 56
420 to 630
Tensile Strength: Ultimate (UTS), MPa 80 to 84
620 to 1020
Tensile Strength: Yield (Proof), MPa 23 to 57
280 to 670

Thermal Properties

Latent Heat of Fusion, J/g 400
300
Maximum Temperature: Mechanical, °C 170
920
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 640
1370
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 230
15
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 200
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.3
6.0
Embodied Energy, MJ/kg 160
87
Embodied Water, L/kg 1190
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 25
150 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 3.8 to 24
190 to 1150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 8.2 to 8.6
22 to 36
Strength to Weight: Bending, points 15 to 16
20 to 28
Thermal Diffusivity, mm2/s 93
4.0
Thermal Shock Resistance, points 3.6 to 3.7
13 to 22

Alloy Composition

Aluminum (Al), % 99.35 to 100
0 to 0.35
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
13.5 to 16
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.65
49.1 to 59.5
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.050
0 to 2.0
Molybdenum (Mo), % 0
1.0 to 1.5
Nickel (Ni), % 0
24 to 27
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.65
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.060
1.9 to 2.4
Vanadium (V), % 0 to 0.050
0.1 to 0.5
Zinc (Zn), % 0 to 0.1
0