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851.0 Aluminum vs. ASTM A369 Grade FP12

851.0 aluminum belongs to the aluminum alloys classification, while ASTM A369 grade FP12 belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (8, 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 851.0 aluminum and the bottom bar is ASTM A369 grade FP12.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 3.9 to 9.1
20
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Tensile Strength: Ultimate (UTS), MPa 130 to 140
470

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 180
430
Melting Completion (Liquidus), °C 630
1470
Melting Onset (Solidus), °C 360
1430
Specific Heat Capacity, J/kg-K 850
470
Thermal Conductivity, W/m-K 180
45
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.8
Density, g/cm3 3.1
7.9
Embodied Carbon, kg CO2/kg material 8.4
1.6
Embodied Energy, MJ/kg 160
21
Embodied Water, L/kg 1140
52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 12 to 13
17
Strength to Weight: Bending, points 19 to 20
17
Thermal Diffusivity, mm2/s 69
12
Thermal Shock Resistance, points 6.1 to 6.3
14

Alloy Composition

Aluminum (Al), % 86.6 to 91.5
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
0.8 to 1.3
Copper (Cu), % 0.7 to 1.3
0
Iron (Fe), % 0 to 0.7
96.8 to 98.4
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.1
0.3 to 0.61
Molybdenum (Mo), % 0
0.44 to 0.65
Nickel (Ni), % 0.3 to 0.7
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 2.0 to 3.0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0
Residuals, % 0 to 0.3
0