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S17700 Stainless Steel vs. 2030 Aluminum

S17700 stainless steel belongs to the iron alloys classification, while 2030 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 S17700 stainless steel and the bottom bar is 2030 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 1.0 to 23
5.6 to 8.0
Fatigue Strength, MPa 290 to 560
91 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 740 to 940
220 to 250
Tensile Strength: Ultimate (UTS), MPa 1180 to 1650
370 to 420
Tensile Strength: Yield (Proof), MPa 430 to 1210
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 890
190
Melting Completion (Liquidus), °C 1440
640
Melting Onset (Solidus), °C 1400
510
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 15
130
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
99

Otherwise Unclassified Properties

Base Metal Price, % relative 13
10
Density, g/cm3 7.7
3.1
Embodied Carbon, kg CO2/kg material 2.8
8.0
Embodied Energy, MJ/kg 40
150
Embodied Water, L/kg 150
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15 to 210
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 3750
390 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 42 to 59
33 to 38
Strength to Weight: Bending, points 32 to 40
37 to 40
Thermal Diffusivity, mm2/s 4.1
50
Thermal Shock Resistance, points 39 to 54
16 to 19

Alloy Composition

Aluminum (Al), % 0.75 to 1.5
88.9 to 95.2
Bismuth (Bi), % 0
0 to 0.2
Carbon (C), % 0 to 0.090
0
Chromium (Cr), % 16 to 18
0 to 0.1
Copper (Cu), % 0
3.3 to 4.5
Iron (Fe), % 70.5 to 76.8
0 to 0.7
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0
0.5 to 1.3
Manganese (Mn), % 0 to 1.0
0.2 to 1.0
Nickel (Ni), % 6.5 to 7.8
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.3