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771.0 Aluminum vs. EN 1.4945 Stainless Steel

771.0 aluminum belongs to the aluminum alloys classification, while EN 1.4945 stainless steel belongs to the iron alloys. There are 30 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 771.0 aluminum and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85 to 120
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 1.7 to 6.5
19 to 34
Fatigue Strength, MPa 92 to 180
230 to 350
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 250 to 370
640 to 740
Tensile Strength: Yield (Proof), MPa 210 to 350
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Maximum Temperature: Mechanical, °C 180
920
Melting Completion (Liquidus), °C 630
1490
Melting Onset (Solidus), °C 620
1440
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 140 to 150
14
Thermal Expansion, µm/m-K 24
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 82
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 3.0
8.1
Embodied Carbon, kg CO2/kg material 8.0
5.0
Embodied Energy, MJ/kg 150
73
Embodied Water, L/kg 1130
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.4 to 20
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 900
210 to 760
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 23 to 35
22 to 25
Strength to Weight: Bending, points 29 to 39
20 to 22
Thermal Diffusivity, mm2/s 54 to 58
3.7
Thermal Shock Resistance, points 11 to 16
14 to 16

Alloy Composition

Aluminum (Al), % 90.5 to 92.5
0
Carbon (C), % 0
0.040 to 0.1
Chromium (Cr), % 0.060 to 0.2
15.5 to 17.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
57.9 to 65.7
Magnesium (Mg), % 0.8 to 1.0
0
Manganese (Mn), % 0 to 0.1
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0 to 0.15
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0.1 to 0.2
0
Tungsten (W), % 0
2.5 to 3.5
Zinc (Zn), % 6.5 to 7.5
0
Residuals, % 0 to 0.15
0