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6463 Aluminum vs. S44725 Stainless Steel

6463 aluminum belongs to the aluminum alloys classification, while S44725 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 6463 aluminum and the bottom bar is S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 42 to 74
180
Elastic (Young's, Tensile) Modulus, GPa 68
200
Elongation at Break, % 9.0 to 17
22
Fatigue Strength, MPa 45 to 76
210
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
81
Shear Strength, MPa 86 to 150
320
Tensile Strength: Ultimate (UTS), MPa 140 to 230
500
Tensile Strength: Yield (Proof), MPa 82 to 200
310

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 160
1100
Melting Completion (Liquidus), °C 660
1450
Melting Onset (Solidus), °C 620
1410
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 190 to 210
17
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 50 to 55
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 170 to 180
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 8.3
3.1
Embodied Energy, MJ/kg 150
44
Embodied Water, L/kg 1190
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 25
99
Resilience: Unit (Modulus of Resilience), kJ/m3 50 to 300
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 14 to 24
18
Strength to Weight: Bending, points 22 to 31
18
Thermal Diffusivity, mm2/s 79 to 86
4.6
Thermal Shock Resistance, points 6.3 to 10
16

Alloy Composition

Aluminum (Al), % 97.9 to 99.4
0
Carbon (C), % 0
0 to 0.015
Chromium (Cr), % 0
25 to 28.5
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.15
67.6 to 73.5
Magnesium (Mg), % 0.45 to 0.9
0
Manganese (Mn), % 0 to 0.050
0 to 0.4
Molybdenum (Mo), % 0
1.5 to 2.5
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0.2 to 0.6
0 to 0.040
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.26
Zinc (Zn), % 0 to 0.050
0
Residuals, % 0 to 0.15
0