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S35125 Stainless Steel vs. 6061 Aluminum

S35125 stainless steel belongs to the iron alloys classification, while 6061 aluminum belongs to the aluminum 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 S35125 stainless steel and the bottom bar is 6061 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 39
3.4 to 20
Fatigue Strength, MPa 200
58 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
26
Shear Strength, MPa 370
84 to 210
Tensile Strength: Ultimate (UTS), MPa 540
130 to 410
Tensile Strength: Yield (Proof), MPa 230
76 to 370

Thermal Properties

Latent Heat of Fusion, J/g 300
400
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1430
650
Melting Onset (Solidus), °C 1380
580
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 12
170
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
43
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
140

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 8.1
2.7
Embodied Carbon, kg CO2/kg material 6.4
8.3
Embodied Energy, MJ/kg 89
150
Embodied Water, L/kg 210
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
3.8 to 81
Resilience: Unit (Modulus of Resilience), kJ/m3 140
42 to 1000
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 19
13 to 42
Strength to Weight: Bending, points 18
21 to 45
Thermal Diffusivity, mm2/s 3.1
68
Thermal Shock Resistance, points 12
5.7 to 18

Alloy Composition

Aluminum (Al), % 0
95.9 to 98.6
Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 20 to 23
0.040 to 0.35
Copper (Cu), % 0
0.15 to 0.4
Iron (Fe), % 36.2 to 45.8
0 to 0.7
Magnesium (Mg), % 0
0.8 to 1.2
Manganese (Mn), % 1.0 to 1.5
0 to 0.15
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 31 to 35
0
Niobium (Nb), % 0.25 to 0.6
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 0.5
0.4 to 0.8
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0
0 to 0.25
Residuals, % 0
0 to 0.15