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ASTM A387 Grade 91 Class 2 vs. 5754 Aluminum

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while 5754 aluminum belongs to the aluminum alloys. There are 31 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 ASTM A387 grade 91 class 2 and the bottom bar is 5754 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
52 to 88
Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 20
2.0 to 19
Fatigue Strength, MPa 330
66 to 140
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
26
Shear Strength, MPa 420
120 to 190
Tensile Strength: Ultimate (UTS), MPa 670
200 to 330
Tensile Strength: Yield (Proof), MPa 470
80 to 280

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 600
190
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
600
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 26
130
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
33
Electrical Conductivity: Equal Weight (Specific), % IACS 10
110

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
8.7
Embodied Energy, MJ/kg 37
150
Embodied Water, L/kg 88
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
6.1 to 32
Resilience: Unit (Modulus of Resilience), kJ/m3 580
47 to 580
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 24
21 to 34
Strength to Weight: Bending, points 22
28 to 39
Thermal Diffusivity, mm2/s 6.9
54
Thermal Shock Resistance, points 19
8.9 to 14

Alloy Composition


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Aluminum (Al), % 0 to 0.020
94.2 to 97.4
Carbon (C), % 0.080 to 0.12
0
Chromium (Cr), % 8.0 to 9.5
0 to 0.3
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 87.3 to 90.3
0 to 0.4
Magnesium (Mg), % 0
2.6 to 3.6
Manganese (Mn), % 0.3 to 0.6
0 to 0.5
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 to 0.4
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.010
0 to 0.15
Vanadium (V), % 0.18 to 0.25
0
Zinc (Zn), % 0
0 to 0.2
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.15