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EN 1.4618 Stainless Steel vs. 6151 Aluminum

EN 1.4618 stainless steel belongs to the iron alloys classification, while 6151 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 6151 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 51
1.1 to 5.7
Fatigue Strength, MPa 240 to 250
80 to 100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 480 to 500
190 to 200
Tensile Strength: Ultimate (UTS), MPa 680 to 700
330 to 340
Tensile Strength: Yield (Proof), MPa 250 to 260
270 to 280

Thermal Properties

Latent Heat of Fusion, J/g 280
410
Maximum Temperature: Mechanical, °C 900
170
Melting Completion (Liquidus), °C 1400
650
Melting Onset (Solidus), °C 1360
590
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
170
Thermal Expansion, µm/m-K 16
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
45
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
150

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.7
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
3.5 to 18
Resilience: Unit (Modulus of Resilience), kJ/m3 160 to 170
520 to 580
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 24 to 25
34
Strength to Weight: Bending, points 22 to 23
39
Thermal Diffusivity, mm2/s 4.0
70
Thermal Shock Resistance, points 15 to 16
15

Alloy Composition

Aluminum (Al), % 0
95.6 to 98.8
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 16.5 to 18.5
0.15 to 0.35
Copper (Cu), % 1.0 to 2.5
0 to 0.35
Iron (Fe), % 62.7 to 72.5
0 to 1.0
Magnesium (Mg), % 0
0.45 to 0.8
Manganese (Mn), % 5.5 to 9.5
0 to 0.2
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
0.6 to 1.2
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15