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772.0 Aluminum vs. EN 1.3955 Stainless Steel

772.0 aluminum belongs to the aluminum alloys classification, while EN 1.3955 stainless steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 772.0 aluminum and the bottom bar is EN 1.3955 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
200
Elongation at Break, % 6.3 to 8.4
23
Fatigue Strength, MPa 94 to 160
150
Poisson's Ratio 0.32
0.28
Shear Modulus, GPa 26
77
Tensile Strength: Ultimate (UTS), MPa 260 to 320
520
Tensile Strength: Yield (Proof), MPa 220 to 250
220

Thermal Properties

Latent Heat of Fusion, J/g 380
290
Maximum Temperature: Mechanical, °C 180
930
Melting Completion (Liquidus), °C 630
1430
Melting Onset (Solidus), °C 580
1380
Specific Heat Capacity, J/kg-K 870
480
Thermal Conductivity, W/m-K 150
15
Thermal Expansion, µm/m-K 24
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
16
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 8.0
3.2
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1140
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 25
95
Resilience: Unit (Modulus of Resilience), kJ/m3 350 to 430
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 25 to 31
18
Strength to Weight: Bending, points 31 to 36
18
Thermal Diffusivity, mm2/s 58
4.1
Thermal Shock Resistance, points 11 to 14
15

Alloy Composition

Aluminum (Al), % 91.2 to 93.2
0
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0.060 to 0.2
16.5 to 18.5
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 0 to 0.15
65.5 to 73.5
Magnesium (Mg), % 0.6 to 0.8
0
Manganese (Mn), % 0 to 0.1
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0
10 to 12
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 0.15
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.0 to 7.0
0
Residuals, % 0 to 0.15
0