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EN 1.4109 Stainless Steel vs. 444.0 Aluminum

EN 1.4109 stainless steel belongs to the iron alloys classification, while 444.0 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 1.4109 stainless steel and the bottom bar is 444.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
50
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 19
25
Fatigue Strength, MPa 270
51
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 76
27
Tensile Strength: Ultimate (UTS), MPa 770
190
Tensile Strength: Yield (Proof), MPa 420
83

Thermal Properties

Latent Heat of Fusion, J/g 280
500
Maximum Temperature: Mechanical, °C 820
170
Melting Completion (Liquidus), °C 1440
610
Melting Onset (Solidus), °C 1400
600
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 30
160
Thermal Expansion, µm/m-K 10
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
40
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
140

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
9.5
Density, g/cm3 7.7
2.6
Embodied Carbon, kg CO2/kg material 2.2
7.9
Embodied Energy, MJ/kg 30
150
Embodied Water, L/kg 110
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
39
Resilience: Unit (Modulus of Resilience), kJ/m3 460
49
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 28
20
Strength to Weight: Bending, points 24
28
Thermal Diffusivity, mm2/s 8.1
67
Thermal Shock Resistance, points 28
8.8

Alloy Composition

Aluminum (Al), % 0
90.5 to 93.5
Carbon (C), % 0.6 to 0.75
0
Chromium (Cr), % 14 to 16
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 80.7 to 85
0 to 0.6
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 1.0
0 to 0.35
Molybdenum (Mo), % 0.4 to 0.8
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 0.7
6.5 to 7.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.35
Residuals, % 0
0 to 0.15