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EN 1.4971 Stainless Steel vs. 240.0 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while 240.0 aluminum belongs to the aluminum 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 EN 1.4971 stainless steel and the bottom bar is 240.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
72
Elongation at Break, % 34
1.0
Fatigue Strength, MPa 270
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
27
Tensile Strength: Ultimate (UTS), MPa 800
240
Tensile Strength: Yield (Proof), MPa 340
200

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1410
520
Specific Heat Capacity, J/kg-K 450
860
Thermal Conductivity, W/m-K 13
96
Thermal Expansion, µm/m-K 15
22

Otherwise Unclassified Properties

Base Metal Price, % relative 70
12
Density, g/cm3 8.4
3.2
Embodied Carbon, kg CO2/kg material 7.6
8.7
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 300
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
2.2
Resilience: Unit (Modulus of Resilience), kJ/m3 280
280
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 24
43
Strength to Weight: Axial, points 26
20
Strength to Weight: Bending, points 23
26
Thermal Diffusivity, mm2/s 3.4
35
Thermal Shock Resistance, points 19
11

Alloy Composition

Aluminum (Al), % 0
81.7 to 86.9
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
7.0 to 9.0
Iron (Fe), % 24.3 to 37.1
0 to 0.5
Magnesium (Mg), % 0
5.5 to 6.5
Manganese (Mn), % 0 to 2.0
0.3 to 0.7
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0.3 to 0.7
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 0.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15