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AISI 304 Stainless Steel vs. Yttria

AISI 304 stainless steel and yttria belong to fundamentally different material chemistries. AISI 304 stainless steel is a metal, while yttria is a ceramic material. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 10 material properties with values for both materials. Properties with values for just one material (26, in this case) are not shown.

For each property being compared, the top bar is AISI 304 stainless steel and the bottom bar is yttria.

AISI 304 (S30400) Stainless SteelYttria (Yttrium Oxide, Y2O3)
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 7.8
5.0
Elastic (Young's, Tensile) Modulus, GPa 200
120
Maximum Temperature: Mechanical, °C 710
2000
Melting Onset (Solidus), °C 1400
2440
Specific Heat Capacity, J/kg-K 480
440
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
32
Thermal Conductivity, W/m-K 16
0.3
Thermal Diffusivity, mm2/s 4.2
0.14
Thermal Expansion, µm/m-K 17
8.0