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EN 1.4618 Stainless Steel vs. 3103 Aluminum

EN 1.4618 stainless steel belongs to the iron alloys classification, while 3103 aluminum belongs to the aluminum alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 1.4618 stainless steel and the bottom bar is 3103 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 210
27 to 62
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 51
1.1 to 28
Fatigue Strength, MPa 240 to 250
38 to 83
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 480 to 500
68 to 130
Tensile Strength: Ultimate (UTS), MPa 680 to 700
100 to 220
Tensile Strength: Yield (Proof), MPa 250 to 260
39 to 200

Thermal Properties

Latent Heat of Fusion, J/g 280
400
Maximum Temperature: Mechanical, °C 900
190
Melting Completion (Liquidus), °C 1400
660
Melting Onset (Solidus), °C 1360
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
160
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
42
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 2.7
8.2
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 150
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 280
2.4 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
11 to 280
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 24 to 25
10 to 22
Strength to Weight: Bending, points 22 to 23
18 to 30
Thermal Diffusivity, mm2/s 4.0
64
Thermal Shock Resistance, points 15 to 16
4.6 to 9.9

Alloy Composition

Aluminum (Al), % 0
96.3 to 99.1
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 16.5 to 18.5
0 to 0.1
Copper (Cu), % 1.0 to 2.5
0 to 0.1
Iron (Fe), % 62.7 to 72.5
0 to 0.7
Magnesium (Mg), % 0
0 to 0.3
Manganese (Mn), % 5.5 to 9.5
0.9 to 1.5
Nickel (Ni), % 4.5 to 5.5
0
Nitrogen (N), % 0 to 0.15
0
Phosphorus (P), % 0 to 0.070
0
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0
0 to 0.1
Residuals, % 0
0 to 0.15