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4007 Aluminum vs. S17700 Stainless Steel

4007 aluminum belongs to the aluminum alloys classification, while S17700 stainless steel belongs to the iron alloys. There are 31 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 4007 aluminum and the bottom bar is S17700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 44
180 to 430
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.1 to 23
1.0 to 23
Fatigue Strength, MPa 46 to 88
290 to 560
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
76
Shear Strength, MPa 80 to 90
740 to 940
Tensile Strength: Ultimate (UTS), MPa 130 to 160
1180 to 1650
Tensile Strength: Yield (Proof), MPa 50 to 120
430 to 1210

Thermal Properties

Latent Heat of Fusion, J/g 410
290
Maximum Temperature: Mechanical, °C 170
890
Melting Completion (Liquidus), °C 650
1440
Melting Onset (Solidus), °C 590
1400
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 170
15
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.1
2.8
Embodied Energy, MJ/kg 150
40
Embodied Water, L/kg 1160
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.4 to 23
15 to 210
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 110
460 to 3750
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 12 to 15
42 to 59
Strength to Weight: Bending, points 20 to 23
32 to 40
Thermal Diffusivity, mm2/s 67
4.1
Thermal Shock Resistance, points 5.5 to 6.7
39 to 54

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0.75 to 1.5
Carbon (C), % 0
0 to 0.090
Chromium (Cr), % 0.050 to 0.25
16 to 18
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0.4 to 1.0
70.5 to 76.8
Magnesium (Mg), % 0 to 0.2
0
Manganese (Mn), % 0.8 to 1.5
0 to 1.0
Nickel (Ni), % 0.15 to 0.7
6.5 to 7.8
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 0.1
0
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0

Comparable Variants