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238.0 Aluminum vs. EN 1.4971 Stainless Steel

238.0 aluminum belongs to the aluminum alloys classification, while EN 1.4971 stainless steel belongs to the iron alloys. There are 27 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 238.0 aluminum and the bottom bar is EN 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
210
Elongation at Break, % 1.5
34
Fatigue Strength, MPa 110
270
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
81
Tensile Strength: Ultimate (UTS), MPa 210
800
Tensile Strength: Yield (Proof), MPa 170
340

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
450
Thermal Conductivity, W/m-K 100
13
Thermal Expansion, µm/m-K 21
15

Otherwise Unclassified Properties

Base Metal Price, % relative 12
70
Density, g/cm3 3.4
8.4
Embodied Carbon, kg CO2/kg material 7.4
7.6
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 1040
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
220
Resilience: Unit (Modulus of Resilience), kJ/m3 180
280
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 42
24
Strength to Weight: Axial, points 17
26
Strength to Weight: Bending, points 23
23
Thermal Diffusivity, mm2/s 37
3.4
Thermal Shock Resistance, points 9.1
19

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 9.5 to 10.5
0
Iron (Fe), % 1.0 to 1.5
24.3 to 37.1
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 3.6 to 4.4
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 1.0 to 1.5
0