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S44700 Stainless Steel vs. 308.0 Aluminum

S44700 stainless steel belongs to the iron alloys classification, while 308.0 aluminum belongs to the aluminum alloys. There are 27 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 308.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
70
Elastic (Young's, Tensile) Modulus, GPa 210
73
Elongation at Break, % 23
2.0
Fatigue Strength, MPa 300
89
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 82
27
Shear Strength, MPa 380
150
Tensile Strength: Ultimate (UTS), MPa 600
190
Tensile Strength: Yield (Proof), MPa 450
110

Thermal Properties

Latent Heat of Fusion, J/g 300
470
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
620
Melting Onset (Solidus), °C 1410
540
Specific Heat Capacity, J/kg-K 480
870
Thermal Expansion, µm/m-K 11
20

Otherwise Unclassified Properties

Base Metal Price, % relative 18
10
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 3.6
7.7
Embodied Energy, MJ/kg 49
140
Embodied Water, L/kg 180
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
3.3
Resilience: Unit (Modulus of Resilience), kJ/m3 480
83
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 21
18
Strength to Weight: Bending, points 20
25
Thermal Shock Resistance, points 19
9.2

Alloy Composition

Aluminum (Al), % 0
85.7 to 91
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 28 to 30
0
Copper (Cu), % 0 to 0.15
4.0 to 5.0
Iron (Fe), % 64.9 to 68.5
0 to 1.0
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 0.3
0 to 0.5
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
5.0 to 6.0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5