Yield Strength

Yield strength is the point beyond which material will permanently deform, and Ultimate strength is the point beyond which the material ceases to resist load. Yield strength is affected by the type, grade or temper of the metal measured in Megapascals (MPa). The yield point is more important than the ultimate strength when designing and using metal roof and wall cladding.

The yield point of any metal can vary depending on the temper. If the yield point is higher, it is possible to reduce the thickness of the metal of the same profile and still obtain equal performance.