Trading volumes for scrap futures contracts on the London Metal Exchange gained in the week to April 13, while the volumes dropped for rebar futures contracts. S&P Global Commodity Insights’ Platts assessed the April contract down $18/mt on week to $619.50/mt on April 13. The May contract fell $20/mt to $610/mt, while the June contract dipped $20.50/mt to $599/mt. The…