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6351-O Aluminum vs. Annealed SAE-AISI 4130

6351-O aluminum belongs to the aluminum alloys classification, while annealed SAE-AISI 4130 belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 6351-O aluminum and the bottom bar is annealed SAE-AISI 4130.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 16
22
Fatigue Strength, MPa 98
320
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 86
340
Tensile Strength: Ultimate (UTS), MPa 140
530
Tensile Strength: Yield (Proof), MPa 95
460

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 160
420
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
43
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 150
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1180
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
110
Resilience: Unit (Modulus of Resilience), kJ/m3 65
560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 14
19
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 72
12
Thermal Shock Resistance, points 6.2
16

Alloy Composition

Aluminum (Al), % 96 to 98.5
0
Carbon (C), % 0
0.28 to 0.33
Chromium (Cr), % 0
0.8 to 1.1
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
97.3 to 98.2
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 0.8
0.4 to 0.6
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.7 to 1.3
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0