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A384.0 Aluminum vs. S40977 Stainless Steel

A384.0 aluminum belongs to the aluminum alloys classification, while S40977 stainless steel belongs to the iron 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 A384.0 aluminum and the bottom bar is S40977 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 74
190
Elongation at Break, % 2.5
21
Fatigue Strength, MPa 140
200
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
76
Shear Strength, MPa 200
320
Tensile Strength: Ultimate (UTS), MPa 330
510
Tensile Strength: Yield (Proof), MPa 170
310

Thermal Properties

Latent Heat of Fusion, J/g 550
270
Maximum Temperature: Mechanical, °C 170
720
Melting Completion (Liquidus), °C 610
1440
Melting Onset (Solidus), °C 510
1400
Specific Heat Capacity, J/kg-K 880
480
Thermal Conductivity, W/m-K 96
25
Thermal Expansion, µm/m-K 21
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 23
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 73
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 11
6.5
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 7.5
1.9
Embodied Energy, MJ/kg 140
27
Embodied Water, L/kg 1010
97

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.9
92
Resilience: Unit (Modulus of Resilience), kJ/m3 180
250
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 32
18
Strength to Weight: Bending, points 38
18
Thermal Diffusivity, mm2/s 39
6.7
Thermal Shock Resistance, points 15
18

Alloy Composition

Aluminum (Al), % 79.3 to 86.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
10.5 to 12.5
Copper (Cu), % 3.0 to 4.5
0
Iron (Fe), % 0 to 1.3
83.9 to 89.2
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.5
0.3 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 10.5 to 12
0 to 1.0
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0