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4343 Aluminum vs. EN 1.7729 Steel

4343 aluminum belongs to the aluminum alloys classification, while EN 1.7729 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 4343 aluminum and the bottom bar is EN 1.7729 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 4.4
17
Fatigue Strength, MPa 45
500
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 64
560
Tensile Strength: Ultimate (UTS), MPa 110
910
Tensile Strength: Yield (Proof), MPa 62
750

Thermal Properties

Latent Heat of Fusion, J/g 510
250
Maximum Temperature: Mechanical, °C 160
430
Melting Completion (Liquidus), °C 620
1470
Melting Onset (Solidus), °C 580
1430
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
40
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 150
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.8
Density, g/cm3 2.6
7.8
Embodied Carbon, kg CO2/kg material 7.9
3.3
Embodied Energy, MJ/kg 150
49
Embodied Water, L/kg 1100
59

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.1
150
Resilience: Unit (Modulus of Resilience), kJ/m3 27
1500
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 53
24
Strength to Weight: Axial, points 12
32
Strength to Weight: Bending, points 20
27
Thermal Diffusivity, mm2/s 77
11
Thermal Shock Resistance, points 5.2
27

Alloy Composition

Aluminum (Al), % 90.3 to 93.2
0.015 to 0.080
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.010
Carbon (C), % 0
0.17 to 0.23
Chromium (Cr), % 0
0.9 to 1.2
Copper (Cu), % 0 to 0.25
0 to 0.2
Iron (Fe), % 0 to 0.8
94.8 to 97
Manganese (Mn), % 0 to 0.1
0.35 to 0.75
Molybdenum (Mo), % 0
0.9 to 1.1
Nickel (Ni), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 6.8 to 8.2
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0
0.070 to 0.15
Vanadium (V), % 0
0.6 to 0.8
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0