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6101B Aluminum vs. EN 1.4981 Stainless Steel

6101B aluminum belongs to the aluminum alloys classification, while EN 1.4981 stainless steel belongs to the iron alloys. There are 30 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 6101B aluminum and the bottom bar is EN 1.4981 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 9.1 to 13
39
Fatigue Strength, MPa 62 to 70
210
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 120 to 150
420
Tensile Strength: Ultimate (UTS), MPa 190 to 250
610
Tensile Strength: Yield (Proof), MPa 140 to 180
240

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 160
940
Melting Completion (Liquidus), °C 640
1440
Melting Onset (Solidus), °C 630
1400
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 210
16
Thermal Expansion, µm/m-K 23
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
25
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.3
4.8
Embodied Energy, MJ/kg 150
67
Embodied Water, L/kg 1190
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 23
190
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 240
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 20 to 25
21
Strength to Weight: Bending, points 27 to 32
20
Thermal Diffusivity, mm2/s 87
4.3
Thermal Shock Resistance, points 8.5 to 11
14

Alloy Composition

Aluminum (Al), % 98.2 to 99.3
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0
15.5 to 17.5
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0.1 to 0.3
59.6 to 66.7
Magnesium (Mg), % 0.35 to 0.6
0
Manganese (Mn), % 0 to 0.050
0 to 1.5
Molybdenum (Mo), % 0
1.6 to 2.0
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.3 to 0.6
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.1
0