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EN 1.4669 Stainless Steel vs. 6101B Aluminum

EN 1.4669 stainless steel belongs to the iron alloys classification, while 6101B 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 1.4669 stainless steel and the bottom bar is 6101B aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Elongation at Break, % 28
9.1 to 13
Fatigue Strength, MPa 330
62 to 70
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 78
26
Shear Strength, MPa 500
120 to 150
Tensile Strength: Ultimate (UTS), MPa 780
190 to 250
Tensile Strength: Yield (Proof), MPa 450
140 to 180

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 1030
160
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1370
630
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 15
210
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
57
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
190

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.6
8.3
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 160
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
20 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 510
140 to 240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 28
20 to 25
Strength to Weight: Bending, points 24
27 to 32
Thermal Diffusivity, mm2/s 4.0
87
Thermal Shock Resistance, points 21
8.5 to 11

Alloy Composition

Aluminum (Al), % 0
98.2 to 99.3
Carbon (C), % 0 to 0.045
0
Chromium (Cr), % 21.5 to 24
0
Copper (Cu), % 1.6 to 3.0
0 to 0.050
Iron (Fe), % 65.2 to 74.8
0.1 to 0.3
Magnesium (Mg), % 0
0.35 to 0.6
Manganese (Mn), % 1.0 to 3.0
0 to 0.050
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.0 to 3.0
0
Nitrogen (N), % 0.12 to 0.2
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.1