MakeItFrom.com
Menu (ESC)

4007 Aluminum vs. AISI 431 Stainless Steel

4007 aluminum belongs to the aluminum alloys classification, while AISI 431 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 AISI 431 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 44
250
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 5.1 to 23
15 to 17
Fatigue Strength, MPa 46 to 88
430 to 610
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 80 to 90
550 to 840
Tensile Strength: Ultimate (UTS), MPa 130 to 160
890 to 1380
Tensile Strength: Yield (Proof), MPa 50 to 120
710 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 410
280
Maximum Temperature: Mechanical, °C 170
850
Melting Completion (Liquidus), °C 650
1510
Melting Onset (Solidus), °C 590
1450
Specific Heat Capacity, J/kg-K 890
480
Thermal Conductivity, W/m-K 170
26
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 42
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.0
Density, g/cm3 2.8
7.7
Embodied Carbon, kg CO2/kg material 8.1
2.2
Embodied Energy, MJ/kg 150
31
Embodied Water, L/kg 1160
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.4 to 23
140 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 110
1270 to 2770
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
25
Strength to Weight: Axial, points 12 to 15
32 to 50
Strength to Weight: Bending, points 20 to 23
27 to 36
Thermal Diffusivity, mm2/s 67
7.0
Thermal Shock Resistance, points 5.5 to 6.7
28 to 43

Alloy Composition

Aluminum (Al), % 94.1 to 97.6
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0.050 to 0.25
15 to 17
Cobalt (Co), % 0 to 0.050
0
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0.4 to 1.0
78.2 to 83.8
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
1.3 to 2.5
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