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EN 1.4971 Stainless Steel vs. 201.0 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while 201.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (8, 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 201.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
95 to 140
Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 34
4.4 to 20
Fatigue Strength, MPa 270
120 to 150
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
27
Shear Strength, MPa 530
290
Tensile Strength: Ultimate (UTS), MPa 800
370 to 470
Tensile Strength: Yield (Proof), MPa 340
220 to 400

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1410
570
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 15
19

Otherwise Unclassified Properties

Base Metal Price, % relative 70
38
Density, g/cm3 8.4
3.1
Embodied Carbon, kg CO2/kg material 7.6
8.7
Embodied Energy, MJ/kg 110
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
19 to 63
Resilience: Unit (Modulus of Resilience), kJ/m3 280
330 to 1160
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 26
33 to 42
Strength to Weight: Bending, points 23
37 to 44
Thermal Diffusivity, mm2/s 3.4
45
Thermal Shock Resistance, points 19
19 to 25

Alloy Composition

Aluminum (Al), % 0
92.1 to 95.1
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
4.0 to 5.2
Iron (Fe), % 24.3 to 37.1
0 to 0.15
Magnesium (Mg), % 0
0.15 to 0.55
Manganese (Mn), % 0 to 2.0
0.2 to 0.5
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 0.1
Silver (Ag), % 0
0.4 to 1.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.15 to 0.35
Tungsten (W), % 2.0 to 3.0
0
Residuals, % 0
0 to 0.1