spoolguy,
For future ref, by definition 800F is the dividing line between soldering and brazing although Silver base alloy brazing is also commonly referred to as Silver Soldering.
Nicrobraz is a trade name. I think it might be Wallcolmonoy's referenced by KDM8011. I think it is a Nickel base braze alloy and usually done by furnace brazing.
Most brazes are silver and copper-based alloy compositions. Nicrobrazes are Ni-based. They are stronger and survive higher temperatures. Wal Colmonoy is the only company I know who makes these.