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EN 1.4646 Stainless Steel vs. 3102 Aluminum

EN 1.4646 stainless steel belongs to the iron alloys classification, while 3102 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 1.4646 stainless steel and the bottom bar is 3102 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 34
23 to 28
Fatigue Strength, MPa 340
31 to 34
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 500
58 to 65
Tensile Strength: Ultimate (UTS), MPa 750
92 to 100
Tensile Strength: Yield (Proof), MPa 430
28 to 34

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 910
180
Melting Completion (Liquidus), °C 1390
640
Melting Onset (Solidus), °C 1340
640
Specific Heat Capacity, J/kg-K 480
900
Thermal Expansion, µm/m-K 17
23

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.8
8.2
Embodied Energy, MJ/kg 41
150
Embodied Water, L/kg 160
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
16 to 22
Resilience: Unit (Modulus of Resilience), kJ/m3 460
5.8 to 8.3
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 27
9.4 to 10
Strength to Weight: Bending, points 24
17 to 18
Thermal Shock Resistance, points 16
4.1 to 4.4

Alloy Composition


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Aluminum (Al), % 0
97.9 to 99.95
Carbon (C), % 0.020 to 0.1
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 1.5 to 3.0
0 to 0.1
Iron (Fe), % 59 to 67.3
0 to 0.7
Manganese (Mn), % 10.5 to 12.5
0.050 to 0.4
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 3.5 to 4.5
0
Nitrogen (N), % 0.2 to 0.3
0
Phosphorus (P), % 0 to 0.050
0
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15