CUPRON Alloy is the standard negative thermoelement used with copper, with iron and with TOPHEL Alloy in ISA Types T, J and E thermocouples, respectively. PCLW-SNX and PCLW-BPX are thermocouple extension wire alloys. This datasheet provides information on composition, physical properties, and tensile properties. Filing Code: Cu-568. Producer or source: Carpenter Technology Corporation.