| Tungsten | Very high melting point and density | Is the part exposed to heat, shielding demand or compact mass limits? | Chemistry, density, hardness and lot traceability. |
| Molybdenum | Thermal stability with workable forms | Will atmosphere, cleaning or cycling influence surface behavior? | Material test report, dimensional check and finish note. |
| Tantalum | Corrosion resistance in selected environments | Does the chemical exposure justify cost and availability planning? | Purity statement, inspection record and handling note. |
| Tungsten carbide | Hardness and wear resistance | Which binder and grain assumptions support the impact condition? | Hardness, density, microstructure and blank geometry. |