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4145 Aluminum vs. EN 1.4588 Stainless Steel

4145 aluminum belongs to the aluminum alloys classification, while EN 1.4588 stainless steel belongs to the iron alloys. There are 29 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 4145 aluminum and the bottom bar is EN 1.4588 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
200
Elongation at Break, % 2.2
34
Fatigue Strength, MPa 48
190
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
80
Tensile Strength: Ultimate (UTS), MPa 120
540
Tensile Strength: Yield (Proof), MPa 68
240

Thermal Properties

Latent Heat of Fusion, J/g 540
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 590
1450
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 880
460
Thermal Conductivity, W/m-K 100
15
Thermal Expansion, µm/m-K 21
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 84
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 10
33
Density, g/cm3 2.8
8.1
Embodied Carbon, kg CO2/kg material 7.6
6.2
Embodied Energy, MJ/kg 140
84
Embodied Water, L/kg 1040
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
150
Resilience: Unit (Modulus of Resilience), kJ/m3 31
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 12
18
Strength to Weight: Bending, points 19
18
Thermal Diffusivity, mm2/s 42
4.0
Thermal Shock Resistance, points 5.5
11

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0 to 0.15
19 to 21
Copper (Cu), % 3.3 to 4.7
0.5 to 1.5
Iron (Fe), % 0 to 0.8
41.2 to 50.4
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0 to 2.0
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 0
24 to 26
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 9.3 to 10.7
0 to 1.0
Sulfur (S), % 0
0 to 0.020
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0