Heat and Fire: What Steel Grades Can—and Cannot—Do
All steels lose strength as temperatures climb. Hardened steels can temper back under high heat. That’s why serious safes combine steel with insulating fills and multi-layer doors—grade helps structure, but insulation buys precious minutes when flames loom.
Heat and Fire: What Steel Grades Can—and Cannot—Do
A reader’s garage saw smoke and localized flames. Their safe with insulated composite walls, a solid door, and decent steel grade held. Paper documents browned but survived. Lesson learned: steel grade helps, but proper fire lining and seals saved the day.
