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S20910 Stainless Steel vs. 1235 Aluminum

S20910 stainless steel belongs to the iron alloys classification, while 1235 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 1235 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 14 to 39
28 to 34
Fatigue Strength, MPa 310 to 460
23 to 58
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 79
26
Shear Strength, MPa 500 to 570
52 to 56
Tensile Strength: Ultimate (UTS), MPa 780 to 940
80 to 84
Tensile Strength: Yield (Proof), MPa 430 to 810
23 to 57

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1080
170
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1380
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 13
230
Thermal Expansion, µm/m-K 16
23

Otherwise Unclassified Properties

Base Metal Price, % relative 22
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 4.8
8.3
Embodied Energy, MJ/kg 68
160
Embodied Water, L/kg 180
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
17 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
3.8 to 24
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 28 to 33
8.2 to 8.6
Strength to Weight: Bending, points 24 to 27
15 to 16
Thermal Diffusivity, mm2/s 3.6
93
Thermal Shock Resistance, points 17 to 21
3.6 to 3.7

Alloy Composition

Aluminum (Al), % 0
99.35 to 100
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 20.5 to 23.5
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 52.1 to 62.1
0 to 0.65
Magnesium (Mg), % 0
0 to 0.050
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 to 0.65
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0.1 to 0.3
0 to 0.050
Zinc (Zn), % 0
0 to 0.1