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EN AC-21100 Aluminum vs. ASTM A356 Grade 9

EN AC-21100 aluminum belongs to the aluminum alloys classification, while ASTM A356 grade 9 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 EN AC-21100 aluminum and the bottom bar is ASTM A356 grade 9.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
200
Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
17
Fatigue Strength, MPa 79 to 87
310
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 340 to 350
670
Tensile Strength: Yield (Proof), MPa 210 to 240
460

Thermal Properties

Latent Heat of Fusion, J/g 390
260
Maximum Temperature: Mechanical, °C 170
440
Melting Completion (Liquidus), °C 670
1470
Melting Onset (Solidus), °C 550
1430
Specific Heat Capacity, J/kg-K 880
470
Thermal Conductivity, W/m-K 130
41
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 11
3.6
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
2.4
Embodied Energy, MJ/kg 150
33
Embodied Water, L/kg 1150
56

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
100
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
570
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 31 to 33
24
Strength to Weight: Bending, points 36 to 37
22
Thermal Diffusivity, mm2/s 48
11
Thermal Shock Resistance, points 15
19

Alloy Composition


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Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
1.0 to 1.5
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
95.2 to 97.2
Manganese (Mn), % 0 to 0.55
0.5 to 0.9
Molybdenum (Mo), % 0
0.9 to 1.2
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.18
0.2 to 0.6
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.15 to 0.3
0
Vanadium (V), % 0
0.2 to 0.35
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0