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R30556 Alloy vs. 771.0 Aluminum

R30556 alloy belongs to the iron alloys classification, while 771.0 aluminum belongs to the aluminum alloys. There are 29 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 R30556 alloy and the bottom bar is 771.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
70
Elongation at Break, % 45
1.7 to 6.5
Fatigue Strength, MPa 320
92 to 180
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 81
26
Tensile Strength: Ultimate (UTS), MPa 780
250 to 370
Tensile Strength: Yield (Proof), MPa 350
210 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1100
180
Melting Completion (Liquidus), °C 1420
630
Melting Onset (Solidus), °C 1330
620
Specific Heat Capacity, J/kg-K 450
870
Thermal Conductivity, W/m-K 11
140 to 150
Thermal Expansion, µm/m-K 15
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
27
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
82

Otherwise Unclassified Properties

Base Metal Price, % relative 70
9.5
Density, g/cm3 8.4
3.0
Embodied Carbon, kg CO2/kg material 8.7
8.0
Embodied Energy, MJ/kg 130
150
Embodied Water, L/kg 300
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 290
4.4 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 290
310 to 900
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
46
Strength to Weight: Axial, points 26
23 to 35
Strength to Weight: Bending, points 22
29 to 39
Thermal Diffusivity, mm2/s 2.9
54 to 58
Thermal Shock Resistance, points 18
11 to 16

Alloy Composition

Aluminum (Al), % 0.1 to 0.5
90.5 to 92.5
Boron (B), % 0 to 0.020
0
Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 21 to 23
0.060 to 0.2
Cobalt (Co), % 16 to 21
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 20.4 to 38.2
0 to 0.15
Lanthanum (La), % 0.0050 to 0.1
0
Magnesium (Mg), % 0
0.8 to 1.0
Manganese (Mn), % 0.5 to 2.0
0 to 0.1
Molybdenum (Mo), % 2.5 to 4.0
0
Nickel (Ni), % 19 to 22.5
0
Niobium (Nb), % 0 to 0.3
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0.2 to 0.8
0 to 0.15
Sulfur (S), % 0 to 0.015
0
Tantalum (Ta), % 0.3 to 1.3
0
Titanium (Ti), % 0
0.1 to 0.2
Tungsten (W), % 2.0 to 3.5
0
Zinc (Zn), % 0.0010 to 0.1
6.5 to 7.5
Residuals, % 0
0 to 0.15