| PZT (Lead-Zirconium-Titanium) PbZr-Ti-OPbZr0.55Ti0.45O3, PbZr 0.35Ti 0.65O3 |
| Palladium-Copper Pd-CuPd-Cu 60-40 wt% |
| Palladium-Platinum Pd-Pt |
| Palladium-Silver Pd-AgPd-Ag 77/23 wt%, 70/30 wt% |
| Palladium-Zirconium oxide Pd-ZrO2Pd-ZrO2 3/97 wt% |
| Pelcoloy® Ni-FeNi-Fe 70/30 wt% |
| Palladium-Nickel Pd-NiPd-Ni 90/10 wt% |
| Platinum-Gold Pt-Au |
| Platinum-Iridium Pt-IrPt-Ir 90/10 wt%, 80/20 wt% |
| Platinum-Palladium Pt-Pd |
| Platinum-Rhodium Pt-RhPt-Rh 90/10 wt%, 80/20 wt% |
| Platinum-Silver Pt-Ag |
| Potassium-Sodium K-NaK-Na 78/22 wt%, 56/44 wt% |