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238.0 Aluminum vs. S44700 Stainless Steel

238.0 aluminum belongs to the aluminum alloys classification, while S44700 stainless steel belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, 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 238.0 aluminum and the bottom bar is S44700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
210
Elongation at Break, % 1.5
23
Fatigue Strength, MPa 110
300
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 28
82
Tensile Strength: Ultimate (UTS), MPa 210
600
Tensile Strength: Yield (Proof), MPa 170
450

Thermal Properties

Latent Heat of Fusion, J/g 430
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 510
1410
Specific Heat Capacity, J/kg-K 840
480
Thermal Expansion, µm/m-K 21
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
18
Density, g/cm3 3.4
7.8
Embodied Carbon, kg CO2/kg material 7.4
3.6
Embodied Energy, MJ/kg 140
49
Embodied Water, L/kg 1040
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
480
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 42
25
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 23
20
Thermal Shock Resistance, points 9.1
19

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0
28 to 30
Copper (Cu), % 9.5 to 10.5
0 to 0.15
Iron (Fe), % 1.0 to 1.5
64.9 to 68.5
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.2
Nickel (Ni), % 0
0 to 0.15
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 3.6 to 4.4
0 to 0.2
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 1.0 to 1.5
0