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ASTM A387 Grade 91 Class 2 vs. 6360 Aluminum

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while 6360 aluminum belongs to the aluminum 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 ASTM A387 grade 91 class 2 and the bottom bar is 6360 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 20
9.0 to 18
Fatigue Strength, MPa 330
31 to 67
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
26
Shear Strength, MPa 420
76 to 130
Tensile Strength: Ultimate (UTS), MPa 670
120 to 220
Tensile Strength: Yield (Proof), MPa 470
57 to 170

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 600
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
630
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 26
210
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
54
Electrical Conductivity: Equal Weight (Specific), % IACS 10
180

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 2.6
8.3
Embodied Energy, MJ/kg 37
150
Embodied Water, L/kg 88
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
14 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 580
24 to 210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 24
13 to 23
Strength to Weight: Bending, points 22
20 to 30
Thermal Diffusivity, mm2/s 6.9
86
Thermal Shock Resistance, points 19
5.5 to 9.9

Alloy Composition

Aluminum (Al), % 0 to 0.020
97.8 to 99.3
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0 to 0.050
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 87.3 to 90.3
0.1 to 0.3
Magnesium (Mg), % 0
0.25 to 0.45
Manganese (Mn), % 0.3 to 0.6
0.020 to 0.15
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.2 to 0.5
0.35 to 0.8
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.010
0 to 0.1
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
0 to 0.1
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.15