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308.0 Aluminum vs. EN 1.7703 Steel

308.0 aluminum belongs to the aluminum alloys classification, while EN 1.7703 steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 308.0 aluminum and the bottom bar is EN 1.7703 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70
200 to 210
Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 2.0
20
Fatigue Strength, MPa 89
320 to 340
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
74
Shear Strength, MPa 150
420 to 430
Tensile Strength: Ultimate (UTS), MPa 190
670 to 690
Tensile Strength: Yield (Proof), MPa 110
460 to 500

Thermal Properties

Latent Heat of Fusion, J/g 470
250
Maximum Temperature: Mechanical, °C 170
460
Melting Completion (Liquidus), °C 620
1470
Melting Onset (Solidus), °C 540
1430
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140
39
Thermal Expansion, µm/m-K 20
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
4.2
Density, g/cm3 2.9
7.9
Embodied Carbon, kg CO2/kg material 7.7
2.5
Embodied Energy, MJ/kg 140
35
Embodied Water, L/kg 1080
61

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.3
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 83
570 to 650
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 47
24
Strength to Weight: Axial, points 18
24
Strength to Weight: Bending, points 25
22
Thermal Diffusivity, mm2/s 55
11
Thermal Shock Resistance, points 9.2
19 to 20

Alloy Composition

Aluminum (Al), % 85.7 to 91
0
Carbon (C), % 0
0.11 to 0.15
Chromium (Cr), % 0
2.0 to 2.5
Copper (Cu), % 4.0 to 5.0
0 to 0.2
Iron (Fe), % 0 to 1.0
94.6 to 96.4
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0.3 to 0.6
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.25
Niobium (Nb), % 0
0 to 0.070
Nitrogen (N), % 0
0 to 0.012
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 5.0 to 6.0
0 to 0.1
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0 to 0.25
0 to 0.030
Vanadium (V), % 0
0.25 to 0.35
Zinc (Zn), % 0 to 1.0
0
Residuals, % 0 to 0.5
0