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EN 1.4958 Stainless Steel vs. 204.0 Aluminum

EN 1.4958 stainless steel belongs to the iron alloys classification, while 204.0 aluminum belongs to the aluminum alloys. There are 29 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 1.4958 stainless steel and the bottom bar is 204.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 40
5.7 to 7.8
Fatigue Strength, MPa 170
63 to 77
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 630
230 to 340
Tensile Strength: Yield (Proof), MPa 190
180 to 220

Thermal Properties

Latent Heat of Fusion, J/g 300
390
Maximum Temperature: Mechanical, °C 1090
170
Melting Completion (Liquidus), °C 1400
650
Melting Onset (Solidus), °C 1350
580
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 12
120
Thermal Expansion, µm/m-K 15
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
29 to 34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
87 to 100

Otherwise Unclassified Properties

Base Metal Price, % relative 30
11
Density, g/cm3 8.0
3.0
Embodied Carbon, kg CO2/kg material 5.3
8.0
Embodied Energy, MJ/kg 75
150
Embodied Water, L/kg 200
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
12 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 95
220 to 350
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 22
21 to 31
Strength to Weight: Bending, points 20
28 to 36
Thermal Diffusivity, mm2/s 3.2
46
Thermal Shock Resistance, points 15
12 to 18

Alloy Composition

Aluminum (Al), % 0.2 to 0.5
93.4 to 95.5
Carbon (C), % 0.030 to 0.080
0
Chromium (Cr), % 19 to 22
0
Cobalt (Co), % 0 to 0.5
0
Copper (Cu), % 0 to 0.5
4.2 to 5.0
Iron (Fe), % 41.1 to 50.6
0 to 0.35
Magnesium (Mg), % 0
0.15 to 0.35
Manganese (Mn), % 0 to 1.5
0 to 0.1
Nickel (Ni), % 30 to 32.5
0 to 0.050
Niobium (Nb), % 0 to 0.1
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
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0.2 to 0.5
0.15 to 0.3
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15