Storm's copper sheet metal is manufactured to the ASTM (American Society for Testing and Materials) B 187, B 152 and B 283-09 specification standards for copper and copper alloy: C11000 copper is 99.90% Copper and .04% Oxygen, for hard drawn sheet and plate offering high thermal and electrical conductivity with low ground resistance.
Because Storm Copper maintains a million-pounds of copper inventory, sheet and plate orders usually ship the next business day. Copper Sheet is also available custom cut to specific lengths.