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EN 1.4971 Stainless Steel vs. 4045 Aluminum

EN 1.4971 stainless steel belongs to the iron alloys classification, while 4045 aluminum belongs to the aluminum alloys. There are 28 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 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 34
2.3
Fatigue Strength, MPa 270
45
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
27
Shear Strength, MPa 530
69
Tensile Strength: Ultimate (UTS), MPa 800
120
Tensile Strength: Yield (Proof), MPa 340
64

Thermal Properties

Latent Heat of Fusion, J/g 300
540
Maximum Temperature: Mechanical, °C 1100
160
Melting Completion (Liquidus), °C 1460
600
Melting Onset (Solidus), °C 1410
580
Specific Heat Capacity, J/kg-K 450
900
Thermal Conductivity, W/m-K 13
170
Thermal Expansion, µm/m-K 15
21

Otherwise Unclassified Properties

Base Metal Price, % relative 70
9.5
Density, g/cm3 8.4
2.6
Embodied Carbon, kg CO2/kg material 7.6
7.8
Embodied Energy, MJ/kg 110
150
Embodied Water, L/kg 300
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 280
29
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
54
Strength to Weight: Axial, points 26
13
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 3.4
74
Thermal Shock Resistance, points 19
5.7

Alloy Composition

Aluminum (Al), % 0
87.4 to 91
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
0 to 0.3
Iron (Fe), % 24.3 to 37.1
0 to 0.8
Magnesium (Mg), % 0
0 to 0.050
Manganese (Mn), % 0 to 2.0
0 to 0.050
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
9.0 to 11
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