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S44627 Stainless Steel vs. 4007 Aluminum

S44627 stainless steel belongs to the iron alloys classification, while 4007 aluminum belongs to the aluminum alloys. There are 31 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 S44627 stainless steel and the bottom bar is 4007 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
32 to 44
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 24
5.1 to 23
Fatigue Strength, MPa 200
46 to 88
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 80
27
Shear Strength, MPa 310
80 to 90
Tensile Strength: Ultimate (UTS), MPa 490
130 to 160
Tensile Strength: Yield (Proof), MPa 300
50 to 120

Thermal Properties

Latent Heat of Fusion, J/g 290
410
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1440
650
Melting Onset (Solidus), °C 1400
590
Specific Heat Capacity, J/kg-K 480
890
Thermal Conductivity, W/m-K 17
170
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
42
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
140

Otherwise Unclassified Properties

Base Metal Price, % relative 14
9.5
Density, g/cm3 7.7
2.8
Embodied Carbon, kg CO2/kg material 2.9
8.1
Embodied Energy, MJ/kg 41
150
Embodied Water, L/kg 160
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
7.4 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 220
18 to 110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
49
Strength to Weight: Axial, points 18
12 to 15
Strength to Weight: Bending, points 18
20 to 23
Thermal Diffusivity, mm2/s 4.6
67
Thermal Shock Resistance, points 16
5.5 to 6.7

Alloy Composition

Aluminum (Al), % 0
94.1 to 97.6
Carbon (C), % 0 to 0.010
0
Chromium (Cr), % 25 to 27.5
0.050 to 0.25
Cobalt (Co), % 0
0 to 0.050
Copper (Cu), % 0 to 0.2
0 to 0.2
Iron (Fe), % 69.2 to 74.2
0.4 to 1.0
Magnesium (Mg), % 0
0 to 0.2
Manganese (Mn), % 0 to 0.4
0.8 to 1.5
Molybdenum (Mo), % 0.75 to 1.5
0
Nickel (Ni), % 0 to 0.5
0.15 to 0.7
Niobium (Nb), % 0.050 to 0.2
0
Nitrogen (N), % 0 to 0.015
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.4
1.0 to 1.7
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15