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S44700 Stainless Steel vs. 1235 Aluminum

S44700 stainless steel belongs to the iron alloys classification, while 1235 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (9, 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 S44700 stainless steel and the bottom bar is 1235 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
69
Elongation at Break, % 23
28 to 34
Fatigue Strength, MPa 300
23 to 58
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 82
26
Shear Strength, MPa 380
52 to 56
Tensile Strength: Ultimate (UTS), MPa 600
80 to 84
Tensile Strength: Yield (Proof), MPa 450
23 to 57

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 11
23

Otherwise Unclassified Properties

Base Metal Price, % relative 18
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.6
8.3
Embodied Energy, MJ/kg 49
160
Embodied Water, L/kg 180
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
17 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 480
3.8 to 24
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 21
8.2 to 8.6
Strength to Weight: Bending, points 20
15 to 16
Thermal Shock Resistance, points 19
3.6 to 3.7

Alloy Composition

Aluminum (Al), % 0
99.35 to 100
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.15
0 to 0.050
Iron (Fe), % 64.9 to 68.5
0 to 0.65
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 0.3
0 to 0.050
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 0 to 0.15
0
Nitrogen (N), % 0 to 0.020
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.2
0 to 0.65
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0
0 to 0.1