(1) Scrap Iron #1 Dealer/Bundles (Chicago Mill) (2) Scrap Iron HMS (Chicago Mill) (3) Cold Rolled Coils (East of Mississippi) (4) Hot Rolled Coils (East of Mississippi) (5) Rebar (EoM) and (6) Standard Plate (EoM). They offer other metals as well, check out the site.
It appears that the prices lag, I'm not sure why. The data ends on July 13 for scrap iron and July 26 for steel. Today is September 7. It could be related to steel price reporting as other commodities show various end dates as well. Either way, check out the 6-month and 3-year charts for Scrap Iron #1 Bundles, Hot Rolled Coils and Rebar. Find more at the site. You can also chart out U.S. Midwest Domestic Hot-Rolled Coil Steel Index Futures at CME.com which trades everyday and the Steel Stock Index ETF (SLX). The steel price benchmarks look similar to the S&P.