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EN 1.6957 Steel vs. 6351 Aluminum

EN 1.6957 steel belongs to the iron alloys classification, while 6351 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 EN 1.6957 steel and the bottom bar is 6351 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 18
7.8 to 18
Fatigue Strength, MPa 530
79 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 570
84 to 200
Tensile Strength: Ultimate (UTS), MPa 930
140 to 310
Tensile Strength: Yield (Proof), MPa 780
95 to 270

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 450
160
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 47
180
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
46
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
150

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 2.1
8.3
Embodied Energy, MJ/kg 29
150
Embodied Water, L/kg 60
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
20 to 38
Resilience: Unit (Modulus of Resilience), kJ/m3 1630
65 to 540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 33
14 to 32
Strength to Weight: Bending, points 27
22 to 38
Thermal Diffusivity, mm2/s 13
72
Thermal Shock Resistance, points 27
6.1 to 14

Alloy Composition

Aluminum (Al), % 0
96 to 98.5
Carbon (C), % 0.22 to 0.32
0
Chromium (Cr), % 1.2 to 1.8
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 92.7 to 94.7
0 to 0.5
Magnesium (Mg), % 0
0.4 to 0.8
Manganese (Mn), % 0.15 to 0.4
0.4 to 0.8
Molybdenum (Mo), % 0.25 to 0.45
0
Nickel (Ni), % 3.4 to 4.0
0
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0 to 0.15
0.7 to 1.3
Sulfur (S), % 0 to 0.0070
0
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0.050 to 0.15
0
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15