Fire efficiency isn't simply the core; bracket alloys, screw qualities, and coating systems all impact ratings

https://lorenzozlrb121.wordpress.com/2026/05/17/why-the-toughest-engineers-define-copper-custom-parts-that-prove-themselves-over-100-years/

Fire efficiency isn't just the core; bracket alloys, bolt qualities, and surface systems all influence ratings, so settings up are checked together for real-world conformity.