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EN 1.4521 Stainless Steel vs. 6101B Aluminum

EN 1.4521 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 (2, 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 1.4521 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, % 23
9.1 to 13
Fatigue Strength, MPa 230
62 to 70
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Shear Strength, MPa 330
120 to 150
Tensile Strength: Ultimate (UTS), MPa 520
190 to 250
Tensile Strength: Yield (Proof), MPa 340
140 to 180

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 930
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1410
630
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 23
210
Thermal Expansion, µm/m-K 10
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 12
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.8
8.3
Embodied Energy, MJ/kg 39
150
Embodied Water, L/kg 130
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
20 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 280
140 to 240
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 19
20 to 25
Strength to Weight: Bending, points 19
27 to 32
Thermal Diffusivity, mm2/s 6.2
87
Thermal Shock Resistance, points 18
8.5 to 11

Alloy Composition

Aluminum (Al), % 0
98.2 to 99.3
Carbon (C), % 0 to 0.025
0
Chromium (Cr), % 17 to 20
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 74.6 to 81.1
0.1 to 0.3
Magnesium (Mg), % 0
0.35 to 0.6
Manganese (Mn), % 0 to 1.0
0 to 0.050
Molybdenum (Mo), % 1.8 to 2.5
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0.3 to 0.6
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.15 to 0.8
0
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.1