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EN 1.4401 Stainless Steel vs. 771.0 Aluminum

EN 1.4401 stainless steel belongs to the iron alloys classification, while 771.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 1.4401 stainless steel and the bottom bar is 771.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
85 to 120
Elastic (Young's, Tensile) Modulus, GPa 200
70
Elongation at Break, % 14 to 40
1.7 to 6.5
Fatigue Strength, MPa 200 to 320
92 to 180
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 78
26
Tensile Strength: Ultimate (UTS), MPa 600 to 900
250 to 370
Tensile Strength: Yield (Proof), MPa 230 to 570
210 to 350

Thermal Properties

Latent Heat of Fusion, J/g 290
380
Maximum Temperature: Mechanical, °C 950
180
Melting Completion (Liquidus), °C 1440
630
Melting Onset (Solidus), °C 1400
620
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 15
140 to 150
Thermal Expansion, µm/m-K 16
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
27
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
82

Otherwise Unclassified Properties

Base Metal Price, % relative 19
9.5
Density, g/cm3 7.9
3.0
Embodied Carbon, kg CO2/kg material 3.8
8.0
Embodied Energy, MJ/kg 52
150
Embodied Water, L/kg 150
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
4.4 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 800
310 to 900
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 21 to 32
23 to 35
Strength to Weight: Bending, points 20 to 26
29 to 39
Thermal Diffusivity, mm2/s 4.0
54 to 58
Thermal Shock Resistance, points 13 to 20
11 to 16

Alloy Composition

Aluminum (Al), % 0
90.5 to 92.5
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 16.5 to 18.5
0.060 to 0.2
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 62.8 to 71.5
0 to 0.15
Magnesium (Mg), % 0
0.8 to 1.0
Manganese (Mn), % 0 to 2.0
0 to 0.1
Molybdenum (Mo), % 2.0 to 2.5
0
Nickel (Ni), % 10 to 13
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0 to 0.15
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0.1 to 0.2
Zinc (Zn), % 0
6.5 to 7.5
Residuals, % 0
0 to 0.15

Comparable Variants