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6070 Aluminum vs. S15700 Stainless Steel

6070 aluminum belongs to the aluminum alloys classification, while S15700 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 6070 aluminum and the bottom bar is S15700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 5.6 to 8.6
1.1 to 29
Fatigue Strength, MPa 95 to 130
370 to 770
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 26
77
Shear Strength, MPa 220 to 240
770 to 1070
Tensile Strength: Ultimate (UTS), MPa 370 to 380
1180 to 1890
Tensile Strength: Yield (Proof), MPa 350
500 to 1770

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 160
870
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 570
1400
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 160
16
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 41
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
3.4
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1170
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 32
17 to 270
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 900
640 to 4660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 38
42 to 67
Strength to Weight: Bending, points 42 to 43
32 to 43
Thermal Diffusivity, mm2/s 65
4.2
Thermal Shock Resistance, points 16 to 17
39 to 63

Alloy Composition

Aluminum (Al), % 94.6 to 98
0.75 to 1.5
Carbon (C), % 0
0 to 0.090
Chromium (Cr), % 0 to 0.1
14 to 16
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.5
69.6 to 76.8
Magnesium (Mg), % 0.5 to 1.2
0
Manganese (Mn), % 0.4 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 0
6.5 to 7.7
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 1.0 to 1.7
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Residuals, % 0 to 0.15
0