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6261 Aluminum vs. ASTM A387 Grade 5 Steel

6261 aluminum belongs to the aluminum alloys classification, while ASTM A387 grade 5 steel 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 6261 aluminum and the bottom bar is ASTM A387 grade 5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 9.0 to 16
20 to 21
Fatigue Strength, MPa 60 to 120
160 to 240
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
74
Shear Strength, MPa 90 to 180
310 to 380
Tensile Strength: Ultimate (UTS), MPa 150 to 300
500 to 600
Tensile Strength: Yield (Proof), MPa 100 to 260
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 400
260
Maximum Temperature: Mechanical, °C 160
510
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 610
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
40
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 160
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
4.3
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.7
Embodied Energy, MJ/kg 150
23
Embodied Water, L/kg 1180
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21 to 27
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 500
140 to 320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 15 to 31
18 to 21
Strength to Weight: Bending, points 23 to 37
18 to 20
Thermal Diffusivity, mm2/s 75
11
Thermal Shock Resistance, points 6.5 to 13
14 to 17

Alloy Composition

Aluminum (Al), % 96.6 to 98.6
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0 to 0.1
4.0 to 6.0
Copper (Cu), % 0.15 to 0.4
0
Iron (Fe), % 0 to 0.4
92.1 to 95.3
Magnesium (Mg), % 0.7 to 1.0
0
Manganese (Mn), % 0.2 to 0.35
0.3 to 0.6
Molybdenum (Mo), % 0
0.45 to 0.65
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0.4 to 0.7
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0

Comparable Variants