MakeItFrom.com
Menu (ESC)

EN 1.4959 Stainless Steel vs. 7020 Aluminum

EN 1.4959 stainless steel belongs to the iron alloys classification, while 7020 aluminum belongs to the aluminum alloys. There are 30 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 7020 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 40
8.4 to 14
Fatigue Strength, MPa 170
110 to 130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 430
110 to 230
Tensile Strength: Ultimate (UTS), MPa 630
190 to 390
Tensile Strength: Yield (Proof), MPa 190
120 to 310

Thermal Properties

Latent Heat of Fusion, J/g 300
380
Maximum Temperature: Mechanical, °C 1090
210
Melting Completion (Liquidus), °C 1400
650
Melting Onset (Solidus), °C 1350
610
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 12
150
Thermal Expansion, µm/m-K 15
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
39
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
120

Otherwise Unclassified Properties

Base Metal Price, % relative 31
9.5
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
23 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 96
110 to 690
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
47
Strength to Weight: Axial, points 22
18 to 37
Strength to Weight: Bending, points 20
25 to 41
Thermal Diffusivity, mm2/s 3.2
59
Thermal Shock Resistance, points 15
8.3 to 17

Alloy Composition

Aluminum (Al), % 0.25 to 0.65
91.2 to 94.8
Carbon (C), % 0.050 to 0.1
0
Chromium (Cr), % 19 to 22
0.1 to 0.35
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
0 to 0.2
Iron (Fe), % 39.4 to 50.5
0 to 0.4
Magnesium (Mg), % 0
1.0 to 1.4
Manganese (Mn), % 0 to 1.5
0.050 to 0.5
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 0.35
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0.25 to 0.65
0 to 0.25
Zinc (Zn), % 0
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.25
Residuals, % 0
0 to 0.15