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EN 1.4971 Stainless Steel vs. EN AC-45000 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while EN AC-45000 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (5, 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 EN AC-45000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
77
Elastic (Young's, Tensile) Modulus, GPa 210
73
Elongation at Break, % 34
1.1
Fatigue Strength, MPa 270
75
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
27
Tensile Strength: Ultimate (UTS), MPa 800
180
Tensile Strength: Yield (Proof), MPa 340
110

Thermal Properties

Latent Heat of Fusion, J/g 300
470
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
520
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 13
120
Thermal Expansion, µm/m-K 15
22

Otherwise Unclassified Properties

Base Metal Price, % relative 70
11
Density, g/cm3 8.4
3.0
Embodied Carbon, kg CO2/kg material 7.6
7.7
Embodied Energy, MJ/kg 110
140
Embodied Water, L/kg 300
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
1.7
Resilience: Unit (Modulus of Resilience), kJ/m3 280
80
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 26
17
Strength to Weight: Bending, points 23
24
Thermal Diffusivity, mm2/s 3.4
47
Thermal Shock Resistance, points 19
8.0

Alloy Composition

Aluminum (Al), % 0
82.2 to 91.8
Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0 to 0.15
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
3.0 to 5.0
Iron (Fe), % 24.3 to 37.1
0 to 1.0
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 0
0 to 0.55
Manganese (Mn), % 0 to 2.0
0.2 to 0.65
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0 to 0.45
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
5.0 to 7.0
Sulfur (S), % 0 to 0.015
0
Tin (Sn), % 0
0 to 0.15
Titanium (Ti), % 0
0 to 0.25
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 2.0
Residuals, % 0
0 to 0.35