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358.0 Aluminum vs. ASTM A387 Grade 91 Class 2

358.0 aluminum belongs to the aluminum alloys classification, while ASTM A387 grade 91 class 2 belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 358.0 aluminum and the bottom bar is ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 3.5 to 6.0
20
Fatigue Strength, MPa 100 to 110
330
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
75
Shear Strength, MPa 300 to 320
420
Tensile Strength: Ultimate (UTS), MPa 350 to 370
670
Tensile Strength: Yield (Proof), MPa 290 to 320
470

Thermal Properties

Latent Heat of Fusion, J/g 520
270
Maximum Temperature: Mechanical, °C 170
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 150
26
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 130
10

Otherwise Unclassified Properties

Base Metal Price, % relative 19
7.0
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 8.7
2.6
Embodied Energy, MJ/kg 160
37
Embodied Water, L/kg 1090
88

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 20
120
Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 710
580
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 53
25
Strength to Weight: Axial, points 37 to 39
24
Strength to Weight: Bending, points 42 to 44
22
Thermal Diffusivity, mm2/s 63
6.9
Thermal Shock Resistance, points 16 to 17
19

Alloy Composition

Aluminum (Al), % 89.1 to 91.8
0 to 0.020
Beryllium (Be), % 0.1 to 0.3
0
Carbon (C), % 0
0.080 to 0.12
Chromium (Cr), % 0 to 0.2
8.0 to 9.5
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 0 to 0.3
87.3 to 90.3
Magnesium (Mg), % 0.4 to 0.6
0
Manganese (Mn), % 0 to 0.2
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 0.020
Silicon (Si), % 7.6 to 8.6
0.2 to 0.5
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0.1 to 0.2
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