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EN 1.4959 Stainless Steel vs. 772.0 Aluminum

EN 1.4959 stainless steel belongs to the iron alloys classification, while 772.0 aluminum belongs to the aluminum 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 EN 1.4959 stainless steel and the bottom bar is 772.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 40
6.3 to 8.4
Fatigue Strength, MPa 170
94 to 160
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 630
260 to 320
Tensile Strength: Yield (Proof), MPa 190
220 to 250

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1090
180
Melting Completion (Liquidus), °C 1400
630
Melting Onset (Solidus), °C 1350
580
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 12
150
Thermal Expansion, µm/m-K 15
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
35
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
110

Otherwise Unclassified Properties

Base Metal Price, % relative 31
9.5
Density, g/cm3 8.0
3.0
Embodied Carbon, kg CO2/kg material 5.4
8.0
Embodied Energy, MJ/kg 76
150
Embodied Water, L/kg 200
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
16 to 25
Resilience: Unit (Modulus of Resilience), kJ/m3 96
350 to 430
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 22
25 to 31
Strength to Weight: Bending, points 20
31 to 36
Thermal Diffusivity, mm2/s 3.2
58
Thermal Shock Resistance, points 15
11 to 14

Alloy Composition

Aluminum (Al), % 0.25 to 0.65
91.2 to 93.2
Carbon (C), % 0.050 to 0.1
0
Chromium (Cr), % 19 to 22
0.060 to 0.2
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0 to 0.1
Iron (Fe), % 39.4 to 50.5
0 to 0.15
Magnesium (Mg), % 0
0.6 to 0.8
Manganese (Mn), % 0 to 1.5
0 to 0.1
Nickel (Ni), % 30 to 34
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.7
0 to 0.15
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.25 to 0.65
0.1 to 0.2
Zinc (Zn), % 0
6.0 to 7.0
Residuals, % 0
0 to 0.15