1) Tough Pitch Copper, it's electrical and thermal conductivity properties
Along with good corrosion resistance and solderability.

A great choice for transformers and circuit breakers or applications where conductivity is the key attribute. It is available in a wide range of gauges and widths in both Annealed and 1/2 Hard.

2) Characteristics
* High Electrical Conductivity - 100+% IACS
* Good Formability
* Corrosion Resistant
* Good Solderability
* Excellent Conductor of Heat

3) PHYSICAL
* Density: 0.323 lbs per cu. In. @ 68'F (annealed)
* Modulus of Elasticity: 17 x 10 6 PSI Tension
* Electrical Conductivity: 101 % IACS @ 68'F (annealed)
* Thermal Conductivity: 226 BTU per sq. Ft. Per hr.
* Thermal Expansion: 9.8 inches/inch/ F x 10x -6 from 68'F to 572'F.