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4343 Aluminum vs. ASTM A203 Steel

4343 aluminum belongs to the aluminum alloys classification, while ASTM A203 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A203 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 4.4
22 to 26
Fatigue Strength, MPa 45
210 to 280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 64
330 to 370
Tensile Strength: Ultimate (UTS), MPa 110
520 to 590
Tensile Strength: Yield (Proof), MPa 62
290 to 390

Thermal Properties

Latent Heat of Fusion, J/g 510
250
Maximum Temperature: Mechanical, °C 160
410
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 580
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 180
52
Thermal Expansion, µm/m-K 22
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.2 to 4.0
Density, g/cm3 2.6
7.9
Embodied Carbon, kg CO2/kg material 7.9
1.6 to 1.7
Embodied Energy, MJ/kg 150
21 to 23
Embodied Water, L/kg 1100
50 to 52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.1
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 27
230 to 410
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 53
24
Strength to Weight: Axial, points 12
18 to 21
Strength to Weight: Bending, points 20
18 to 20
Thermal Diffusivity, mm2/s 77
14
Thermal Shock Resistance, points 5.2
15 to 17