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238.0 Aluminum vs. EN 1.4658 Stainless Steel

238.0 aluminum belongs to the aluminum alloys classification, while EN 1.4658 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 EN 1.4658 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
210
Elongation at Break, % 1.5
28
Fatigue Strength, MPa 110
530
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 28
81
Tensile Strength: Ultimate (UTS), MPa 210
900
Tensile Strength: Yield (Proof), MPa 170
730

Thermal Properties

Latent Heat of Fusion, J/g 430
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 600
1450
Melting Onset (Solidus), °C 510
1400
Specific Heat Capacity, J/kg-K 840
470
Thermal Conductivity, W/m-K 100
16
Thermal Expansion, µm/m-K 21
13

Otherwise Unclassified Properties

Base Metal Price, % relative 12
25
Density, g/cm3 3.4
7.8
Embodied Carbon, kg CO2/kg material 7.4
4.5
Embodied Energy, MJ/kg 140
61
Embodied Water, L/kg 1040
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
240
Resilience: Unit (Modulus of Resilience), kJ/m3 180
1280
Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 42
25
Strength to Weight: Axial, points 17
32
Strength to Weight: Bending, points 23
26
Thermal Diffusivity, mm2/s 37
4.3
Thermal Shock Resistance, points 9.1
24

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
0.5 to 2.0
Copper (Cu), % 9.5 to 10.5
0 to 1.0
Iron (Fe), % 1.0 to 1.5
50.9 to 63.7
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 0
5.5 to 9.5
Nitrogen (N), % 0
0.3 to 0.5
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 3.6 to 4.4
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Zinc (Zn), % 1.0 to 1.5
0