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AISI 303 Stainless Steel vs. 2195 Aluminum

AISI 303 stainless steel belongs to the iron alloys classification, while 2195 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 AISI 303 stainless steel and the bottom bar is 2195 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
69
Elongation at Break, % 40 to 51
9.3
Fatigue Strength, MPa 230 to 360
190
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Shear Strength, MPa 430 to 470
350
Tensile Strength: Ultimate (UTS), MPa 600 to 690
590
Tensile Strength: Yield (Proof), MPa 230 to 420
560

Thermal Properties

Latent Heat of Fusion, J/g 290
390
Maximum Temperature: Mechanical, °C 930
210
Melting Completion (Liquidus), °C 1450
660
Melting Onset (Solidus), °C 1400
550
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 16
130
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
100

Otherwise Unclassified Properties

Base Metal Price, % relative 15
31
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 3.0
8.6
Embodied Energy, MJ/kg 42
160
Embodied Water, L/kg 140
1470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
54
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 440
2290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
46
Strength to Weight: Axial, points 21 to 25
55
Strength to Weight: Bending, points 20 to 22
53
Thermal Diffusivity, mm2/s 4.4
49
Thermal Shock Resistance, points 13 to 15
26

Alloy Composition

Aluminum (Al), % 0
91.9 to 94.9
Carbon (C), % 0 to 0.15
0
Chromium (Cr), % 17 to 19
0
Copper (Cu), % 0
3.7 to 4.3
Iron (Fe), % 67.3 to 74.9
0 to 0.15
Lithium (Li), % 0
0.8 to 1.2
Magnesium (Mg), % 0
0.25 to 0.8
Manganese (Mn), % 0 to 2.0
0 to 0.25
Nickel (Ni), % 8.0 to 10
0
Phosphorus (P), % 0 to 0.2
0
Silicon (Si), % 0 to 1.0
0 to 0.12
Silver (Ag), % 0
0.25 to 0.6
Sulfur (S), % 0.15 to 0.35
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0
0.080 to 0.16
Residuals, % 0
0 to 0.15