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EN 1.4971 Stainless Steel vs. 8090 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while 8090 aluminum belongs to the aluminum 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 EN 1.4971 stainless steel and the bottom bar is 8090 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
67
Elongation at Break, % 34
3.5 to 13
Fatigue Strength, MPa 270
91 to 140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
25
Tensile Strength: Ultimate (UTS), MPa 800
340 to 490
Tensile Strength: Yield (Proof), MPa 340
210 to 420

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1460
660
Melting Onset (Solidus), °C 1410
600
Specific Heat Capacity, J/kg-K 450
960
Thermal Conductivity, W/m-K 13
95 to 160
Thermal Expansion, µm/m-K 15
24

Otherwise Unclassified Properties

Base Metal Price, % relative 70
18
Density, g/cm3 8.4
2.7
Embodied Carbon, kg CO2/kg material 7.6
8.6
Embodied Energy, MJ/kg 110
170
Embodied Water, L/kg 300
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
16 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 280
340 to 1330
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 26
34 to 49
Strength to Weight: Bending, points 23
39 to 50
Thermal Diffusivity, mm2/s 3.4
36 to 60
Thermal Shock Resistance, points 19
15 to 22

Alloy Composition

Aluminum (Al), % 0
93 to 98.4
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0 to 0.1
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
1.0 to 1.6
Iron (Fe), % 24.3 to 37.1
0 to 0.3
Lithium (Li), % 0
2.2 to 2.7
Magnesium (Mg), % 0
0.6 to 1.3
Manganese (Mn), % 0 to 2.0
0 to 0.1
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.040 to 0.16
Residuals, % 0
0 to 0.15