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1050A-O Aluminum vs. EN 1.7701 +A Steel

1050A-O aluminum belongs to the aluminum alloys classification, while EN 1.7701 +A steel belongs to the iron alloys. 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 1050A-O aluminum and the bottom bar is EN 1.7701 +A steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 20
210
Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 33
20
Fatigue Strength, MPa 27
300
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 51
440
Tensile Strength: Ultimate (UTS), MPa 77
710
Tensile Strength: Yield (Proof), MPa 23
440

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 170
420
Melting Completion (Liquidus), °C 660
1460
Melting Onset (Solidus), °C 650
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 230
44
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 59
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 200
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
2.6
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.9
Embodied Energy, MJ/kg 150
26
Embodied Water, L/kg 1200
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
130
Resilience: Unit (Modulus of Resilience), kJ/m3 3.8
510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 7.9
25
Strength to Weight: Bending, points 15
23
Thermal Diffusivity, mm2/s 94
12
Thermal Shock Resistance, points 3.4
21

Alloy Composition

Aluminum (Al), % 99.5 to 100
0
Carbon (C), % 0
0.48 to 0.56
Chromium (Cr), % 0
0.9 to 1.2
Copper (Cu), % 0 to 0.050
0
Iron (Fe), % 0 to 0.4
96.2 to 97.7
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.050
0.7 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.3
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.25
0 to 0.4
Sulfur (S), % 0
0 to 0.025
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0
0.1 to 0.2
Zinc (Zn), % 0 to 0.070
0