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The ability of the protective box material to resist deformation and fracture under a certain temperature condition and external force is called the mechanical properties of the material. The general mechanical properties of materials for boilers and pressure vessels include strength, hardness, plasticity, and toughness.

Canggu protection box toughness refers to the ability of metal materials to withstand impact loads. Toughness is commonly referred to as impact energy Ak and impact toughness value αk. In addition to reflecting the material's impact resistance, Αk or αk values are also sensitive to some of the material's deficiencies and can sensitively reflect minor changes in material quality, macro defects, and microstructure. Moreover, Ak is very sensitive to the brittle transformation of the material, and the low-temperature impact test can test the cold brittleness of the steel. A new indicator of the toughness of a material is the fracture toughness δ, which reflects the material's resistance to crack propagation.