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4104 Aluminum vs. ASTM A369 Grade FP91

4104 aluminum belongs to the aluminum alloys classification, while ASTM A369 grade FP91 belongs to the iron alloys. There are 30 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 4104 aluminum and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 2.4
19
Fatigue Strength, MPa 42
320
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 63
410
Tensile Strength: Ultimate (UTS), MPa 110
670
Tensile Strength: Yield (Proof), MPa 60
460

Thermal Properties

Latent Heat of Fusion, J/g 540
270
Maximum Temperature: Mechanical, °C 160
600
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 130
26
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 120
10

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
7.0
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.6
Embodied Energy, MJ/kg 150
37
Embodied Water, L/kg 1080
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
110
Resilience: Unit (Modulus of Resilience), kJ/m3 25
560
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 54
25
Strength to Weight: Axial, points 12
24
Strength to Weight: Bending, points 20
22
Thermal Diffusivity, mm2/s 58
6.9
Thermal Shock Resistance, points 5.1
18

Alloy Composition

Aluminum (Al), % 85.8 to 90
0 to 0.020
Bismuth (Bi), % 0.020 to 0.2
0
Carbon (C), % 0
0.080 to 0.12
Chromium (Cr), % 0
8.0 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.8
87.3 to 90.3
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0 to 0.1
0.3 to 0.6
Molybdenum (Mo), % 0
0.85 to 1.1
Nickel (Ni), % 0
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 9.0 to 10.5
0.2 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0
0.18 to 0.25
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0
0 to 0.010
Residuals, % 0 to 0.15
0