Material Rates
The material rate changes in the 2020-03 release represent fluctuations in the materials markets. There were no material price assumption changes in this release.
In general, the material market saw an overall decrease. Heat Resistant Super Alloys experienced the largest reduction in material rate. The material rates reduction, like the decreases in exchange rates, were mostly due to the COVID-19 pandemic.
The table shows the variation by material type between the 2020-01 to 2020-03 Regional Data Libraries Regional Data Libraries releases.
| Non-Ferrous | Ferrous Metals | Plastics |
| Aluminum | -7.5% | Ductile Iron | -8.6% | Nylon | -2.6% |
| Aluminum Bronze | -8.3% | Galvanized Steel | -2.5% | Polypropylene | -2.9% |
| Brass | -6.7% | Gray Iron | -8.6% | Polystyrene | -6.7% |
| Bronze | -5.5% | Low-Alloy Steel | -2.3% | | |
| Copper | -5.3% | Malleable Cast Iron | -8.5% | | |
| Heat Resistant Super Alloys | -21.5% | Stainless Steel | -13.9% | | |
| Magnesium | -11.7% | Steel | -5.7% | | |
| Titanium | -12.0% | Unalloyed Steel | -3.5% | | |
| Zinc | -12.2% | | | | |
| Zinc-Aluminum | -11.6% | | | | |