Designer's Guide Results
The following is a list of materials, selected and ranked per your specification.

MaterialCompressive Strength
Tungsten Carbide580 kpsi
Silicon Carbide Sintered550 kpsi
Zirconia-TZP360 - 700 kpsi
Alumina 99.9%510 kpsi
Silicon Nitride435 - 500 kpsi
Sapphire425 kpsi
Sialon300 - 510 kpsi
Alumina 99.5%368 kpsi
Silicon Carbide Reaction Bonded360 - 362 kpsi
Alumina 94%300 - 350 kpsi
Reference Materials
Tool Steel145 - 290 kpsi
Stainless Steel30.4 kpsi
Diamondn/a

All properties values are at room temperature unless otherwise noted. Engineering data are representative, and are not intended as absolute nor warrantable. Data shown is blended from multiple sources and therefore illustrates the marketplace. The relative rankings are approximate and are based on representative values if the particular material has a range of values for a given property.

Wikipedia Definition(s) :  Compressive Strength;

Check Different Properties

Please Note:  This Designers guide is compiled of materials currently machined by Insaco and a few others included for reference.