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AISI 202 Stainless Steel vs. 204.0 Aluminum

AISI 202 stainless steel belongs to the iron alloys classification, while 204.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 AISI 202 stainless steel and the bottom bar is 204.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 300
90 to 120
Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 14 to 45
5.7 to 7.8
Fatigue Strength, MPa 290 to 330
63 to 77
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
27
Tensile Strength: Ultimate (UTS), MPa 700 to 980
230 to 340
Tensile Strength: Yield (Proof), MPa 310 to 580
180 to 220

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 910
170
Melting Completion (Liquidus), °C 1400
650
Melting Onset (Solidus), °C 1360
580
Specific Heat Capacity, J/kg-K 480
880
Thermal Conductivity, W/m-K 15
120
Thermal Expansion, µm/m-K 17
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
29 to 34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
87 to 100

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 7.7
3.0
Embodied Carbon, kg CO2/kg material 2.8
8.0
Embodied Energy, MJ/kg 40
150
Embodied Water, L/kg 150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
12 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 840
220 to 350
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 25 to 35
21 to 31
Strength to Weight: Bending, points 23 to 29
28 to 36
Thermal Diffusivity, mm2/s 4.0
46
Thermal Shock Resistance, points 15 to 21
12 to 18

Alloy Composition

Aluminum (Al), % 0
93.4 to 95.5
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
4.2 to 5.0
Iron (Fe), % 63.5 to 71.5
0 to 0.35
Magnesium (Mg), % 0
0.15 to 0.35
Manganese (Mn), % 7.5 to 10
0 to 0.1
Nickel (Ni), % 4.0 to 6.0
0 to 0.050
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.030
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