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EN 1.4959 Stainless Steel vs. 7108A Aluminum

EN 1.4959 stainless steel belongs to the iron alloys classification, while 7108A aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 40
11 to 13
Fatigue Strength, MPa 170
120 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 430
210
Tensile Strength: Ultimate (UTS), MPa 630
350
Tensile Strength: Yield (Proof), MPa 190
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1090
210
Melting Completion (Liquidus), °C 1400
630
Melting Onset (Solidus), °C 1350
520
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
36
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
110

Otherwise Unclassified Properties

Base Metal Price, % relative 31
10
Density, g/cm3 8.0
2.9
Embodied Carbon, kg CO2/kg material 5.4
8.3
Embodied Energy, MJ/kg 76
150
Embodied Water, L/kg 200
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 96
610 to 640
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 22
33 to 34
Strength to Weight: Bending, points 20
38
Thermal Diffusivity, mm2/s 3.2
59
Thermal Shock Resistance, points 15
15 to 16

Alloy Composition

Aluminum (Al), % 0.25 to 0.65
91.6 to 94.4
Carbon (C), % 0.050 to 0.1
0
Chromium (Cr), % 19 to 22
0 to 0.040
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 39.4 to 50.5
0 to 0.3
Magnesium (Mg), % 0
0.7 to 1.5
Manganese (Mn), % 0 to 1.5
0 to 0.050
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 0.2
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.25 to 0.65
0 to 0.030
Zinc (Zn), % 0
4.8 to 5.8
Zirconium (Zr), % 0
0.15 to 0.25
Residuals, % 0
0 to 0.15