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6151 Aluminum vs. AISI 201LN Stainless Steel

6151 aluminum belongs to the aluminum alloys classification, while AISI 201LN 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 6151 aluminum and the bottom bar is AISI 201LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 1.1 to 5.7
25 to 51
Fatigue Strength, MPa 80 to 100
340 to 540
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 190 to 200
530 to 680
Tensile Strength: Ultimate (UTS), MPa 330 to 340
740 to 1060
Tensile Strength: Yield (Proof), MPa 270 to 280
350 to 770

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 170
880
Melting Completion (Liquidus), °C 650
1410
Melting Onset (Solidus), °C 590
1370
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 170
15
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 45
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 150
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
38
Embodied Water, L/kg 1180
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.5 to 18
230 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 580
310 to 1520
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 34
27 to 38
Strength to Weight: Bending, points 39
24 to 30
Thermal Diffusivity, mm2/s 70
4.0
Thermal Shock Resistance, points 15
16 to 23

Alloy Composition

Aluminum (Al), % 95.6 to 98.8
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0.15 to 0.35
16 to 17.5
Copper (Cu), % 0 to 0.35
0 to 1.0
Iron (Fe), % 0 to 1.0
67.9 to 73.5
Magnesium (Mg), % 0.45 to 0.8
0
Manganese (Mn), % 0 to 0.2
6.4 to 7.5
Nickel (Ni), % 0
4.0 to 5.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.6 to 1.2
0 to 0.75
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0