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4145 Aluminum vs. EN 1.4477 Stainless Steel

4145 aluminum belongs to the aluminum alloys classification, while EN 1.4477 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 4145 aluminum and the bottom bar is EN 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
210
Elongation at Break, % 2.2
22 to 23
Fatigue Strength, MPa 48
420 to 490
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 28
81
Shear Strength, MPa 69
550 to 580
Tensile Strength: Ultimate (UTS), MPa 120
880 to 930
Tensile Strength: Yield (Proof), MPa 68
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 540
300
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 590
1430
Melting Onset (Solidus), °C 520
1380
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 100
13
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 84
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 10
20
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 7.6
3.7
Embodied Energy, MJ/kg 140
52
Embodied Water, L/kg 1040
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 31
940 to 1290
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12
31 to 33
Strength to Weight: Bending, points 19
26 to 27
Thermal Diffusivity, mm2/s 42
3.5
Thermal Shock Resistance, points 5.5
23 to 25

Alloy Composition


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Aluminum (Al), % 83 to 87.4
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0 to 0.15
28 to 30
Copper (Cu), % 3.3 to 4.7
0 to 0.8
Iron (Fe), % 0 to 0.8
56.6 to 63.6
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0.8 to 1.5
Molybdenum (Mo), % 0
1.5 to 2.6
Nickel (Ni), % 0
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 9.3 to 10.7
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0