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6351 Aluminum vs. EN 1.7216 Steel

6351 aluminum belongs to the aluminum alloys classification, while EN 1.7216 steel belongs to the iron alloys. There are 30 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 6351 aluminum and the bottom bar is EN 1.7216 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 7.8 to 18
12 to 23
Fatigue Strength, MPa 79 to 130
290 to 440
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 84 to 200
410 to 560
Tensile Strength: Ultimate (UTS), MPa 140 to 310
650 to 930
Tensile Strength: Yield (Proof), MPa 95 to 270
400 to 690

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 160
420
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 570
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
46
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 150
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1180
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 38
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 65 to 540
430 to 1280
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 14 to 32
23 to 33
Strength to Weight: Bending, points 22 to 38
21 to 27
Thermal Diffusivity, mm2/s 72
12
Thermal Shock Resistance, points 6.1 to 14
19 to 27

Alloy Composition

Aluminum (Al), % 96 to 98.5
0
Carbon (C), % 0
0.27 to 0.34
Chromium (Cr), % 0
0.8 to 1.2
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.5
97.2 to 98.4
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.4 to 0.8
0.35 to 0.6
Molybdenum (Mo), % 0
0.15 to 0.3
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.7 to 1.3
0 to 0.35
Sulfur (S), % 0
0 to 0.035
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0

Comparable Variants