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4045 Aluminum vs. EN 1.4435 Stainless Steel

4045 aluminum belongs to the aluminum alloys classification, while EN 1.4435 stainless steel belongs to the iron alloys. There are 30 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 4045 aluminum and the bottom bar is EN 1.4435 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 2.3
43
Fatigue Strength, MPa 45
220
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
78
Shear Strength, MPa 69
420
Tensile Strength: Ultimate (UTS), MPa 120
610
Tensile Strength: Yield (Proof), MPa 64
240

Thermal Properties

Latent Heat of Fusion, J/g 540
290
Maximum Temperature: Mechanical, °C 160
980
Melting Completion (Liquidus), °C 600
1440
Melting Onset (Solidus), °C 580
1400
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 170
15
Thermal Expansion, µm/m-K 21
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 45
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 160
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
21
Density, g/cm3 2.6
7.9
Embodied Carbon, kg CO2/kg material 7.8
4.1
Embodied Energy, MJ/kg 150
57
Embodied Water, L/kg 1070
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.4
210
Resilience: Unit (Modulus of Resilience), kJ/m3 29
150
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 54
25
Strength to Weight: Axial, points 13
21
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 74
4.0
Thermal Shock Resistance, points 5.7
14

Alloy Composition

Aluminum (Al), % 87.4 to 91
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 0 to 0.8
59.8 to 68
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.050
0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0
12.5 to 15
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 9.0 to 11
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0