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EN 1.4658 Stainless Steel vs. 204.0 Aluminum

EN 1.4658 stainless steel belongs to the iron alloys classification, while 204.0 aluminum belongs to the aluminum alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, 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 1.4658 stainless steel and the bottom bar is 204.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
90 to 120
Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 28
5.7 to 7.8
Fatigue Strength, MPa 530
63 to 77
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 81
27
Tensile Strength: Ultimate (UTS), MPa 900
230 to 340
Tensile Strength: Yield (Proof), MPa 730
180 to 220

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1450
650
Melting Onset (Solidus), °C 1400
580
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 16
120
Thermal Expansion, µm/m-K 13
19

Otherwise Unclassified Properties

Base Metal Price, % relative 25
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 4.5
8.0
Embodied Energy, MJ/kg 61
150
Embodied Water, L/kg 200
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
12 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 1280
220 to 350
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 32
21 to 31
Strength to Weight: Bending, points 26
28 to 36
Thermal Diffusivity, mm2/s 4.3
46
Thermal Shock Resistance, points 24
12 to 18

Alloy Composition

Aluminum (Al), % 0
93.4 to 95.5
Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 0.5 to 2.0
0
Copper (Cu), % 0 to 1.0
4.2 to 5.0
Iron (Fe), % 50.9 to 63.7
0 to 0.35
Magnesium (Mg), % 0
0.15 to 0.35
Manganese (Mn), % 0 to 1.5
0 to 0.1
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 5.5 to 9.5
0 to 0.050
Nitrogen (N), % 0.3 to 0.5
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 0.5
0 to 0.2
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0.15 to 0.3
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15