Material Rates

The material rate changes in the 2020-01 release represent fluctuations in the materials markets. There are no material price assumption changes in this release.

In general, the material 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 Regional Data Libraries releases.

Non-Ferrous Metals		Ferrous Metals		Plastics
Aluminum	2.9%	Ductile Iron	4.0%	ABS	10.4%
Aluminum Bronze	4.3%	Galvanized Steel	3.2%	Polypropylene	-7.0%
Brass	3.5%	Gray Iron	3.9%	Polystyrene	-2.1%
Bronze	3.2%	Low-Alloy Steel	3.1%
Copper	2.9%	Malleable Cast Iron	4.0%
Heat Resistant Super Alloys	8.1%	Stainless Steel	5.8%
Titanium	-1.6%	Steel	3.6%
Zinc	4.7%	Unalloyed Steel	3.3%
Zinc-Aluminum	4.5%