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EN 1.4971 Stainless Steel vs. 5040 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while 5040 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 5040 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
66 to 74
Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 34
5.7 to 6.8
Fatigue Strength, MPa 270
100 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
26
Shear Strength, MPa 530
140 to 150
Tensile Strength: Ultimate (UTS), MPa 800
240 to 260
Tensile Strength: Yield (Proof), MPa 340
190 to 230

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1410
600
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
160
Thermal Expansion, µm/m-K 15
23

Otherwise Unclassified Properties

Base Metal Price, % relative 70
9.5
Density, g/cm3 8.4
2.8
Embodied Carbon, kg CO2/kg material 7.6
8.3
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 300
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
14 to 15
Resilience: Unit (Modulus of Resilience), kJ/m3 280
260 to 380
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 26
24 to 26
Strength to Weight: Bending, points 23
31 to 32
Thermal Diffusivity, mm2/s 3.4
64
Thermal Shock Resistance, points 19
10 to 11

Alloy Composition

Aluminum (Al), % 0
95.2 to 98
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0.1 to 0.3
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 24.3 to 37.1
0 to 0.7
Magnesium (Mg), % 0
1.0 to 1.5
Manganese (Mn), % 0 to 2.0
0.9 to 1.4
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 0.3
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15