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S40977 Stainless Steel vs. 2030 Aluminum

S40977 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 S40977 stainless steel and the bottom bar is 2030 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 21
5.6 to 8.0
Fatigue Strength, MPa 200
91 to 110
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
26
Shear Strength, MPa 320
220 to 250
Tensile Strength: Ultimate (UTS), MPa 510
370 to 420
Tensile Strength: Yield (Proof), MPa 310
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 270
390
Maximum Temperature: Mechanical, °C 720
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 25
130
Thermal Expansion, µm/m-K 10
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
34
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
99

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
10
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 1.9
8.0
Embodied Energy, MJ/kg 27
150
Embodied Water, L/kg 97
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 92
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 250
390 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 18
33 to 38
Strength to Weight: Bending, points 18
37 to 40
Thermal Diffusivity, mm2/s 6.7
50
Thermal Shock Resistance, points 18
16 to 19

Alloy Composition

Aluminum (Al), % 0
88.9 to 95.2
Bismuth (Bi), % 0
0 to 0.2
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 10.5 to 12.5
0 to 0.1
Copper (Cu), % 0
3.3 to 4.5
Iron (Fe), % 83.9 to 89.2
0 to 0.7
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0
0.5 to 1.3
Manganese (Mn), % 0 to 1.5
0.2 to 1.0
Nickel (Ni), % 0.3 to 1.0
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.8
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.3