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EN AC-21100 Aluminum vs. R30556 Alloy

EN AC-21100 aluminum belongs to the aluminum alloys classification, while R30556 alloy belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 R30556 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 6.2 to 7.3
45
Fatigue Strength, MPa 79 to 87
320
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
81
Tensile Strength: Ultimate (UTS), MPa 340 to 350
780
Tensile Strength: Yield (Proof), MPa 210 to 240
350

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 670
1420
Melting Onset (Solidus), °C 550
1330
Specific Heat Capacity, J/kg-K 880
450
Thermal Conductivity, W/m-K 130
11
Thermal Expansion, µm/m-K 23
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 100
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
70
Density, g/cm3 3.0
8.4
Embodied Carbon, kg CO2/kg material 8.0
8.7
Embodied Energy, MJ/kg 150
130
Embodied Water, L/kg 1150
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
290
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
23
Strength to Weight: Axial, points 31 to 33
26
Strength to Weight: Bending, points 36 to 37
22
Thermal Diffusivity, mm2/s 48
2.9
Thermal Shock Resistance, points 15
18

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0.1 to 0.5
Boron (B), % 0
0 to 0.020
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
21 to 23
Cobalt (Co), % 0
16 to 21
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
20.4 to 38.2
Lanthanum (La), % 0
0.0050 to 0.1
Manganese (Mn), % 0 to 0.55
0.5 to 2.0
Molybdenum (Mo), % 0
2.5 to 4.0
Nickel (Ni), % 0
19 to 22.5
Niobium (Nb), % 0
0 to 0.3
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.18
0.2 to 0.8
Sulfur (S), % 0
0 to 0.015
Tantalum (Ta), % 0
0.3 to 1.3
Titanium (Ti), % 0.15 to 0.3
0
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 0 to 0.070
0.0010 to 0.1
Residuals, % 0 to 0.1
0