Material Rates
The material rate changes in the 2019-10 release represent fluctuations in the materials markets; there were no material price assumption changes in this release. In general, the metals market saw minor fluctuations in costs with no discernable or significant trends. The table shows the variation by material type between the 2019-08 to 2019-10 RDL releases.
Ferrous Metals | | Non-Ferrous Metals |
Cast Iron | -7% | | Aluminum | -2% |
Steel | 5% | | Brass | -5% |
Stainless Steel | 5% | | Bronze | -4% |
| | | Copper | -3% |
| | | Heat Resistant Super Alloys | 12% |
| | | Titanium | -8% |
| | | Zinc | -12% |
The plastics material market saw minimal changes between the 2019-08 and 2019-10 RDL releases; all material types saw no change except Polypropylene, which increased about 3%, and Polystyrene, which increased about 2%.