1. Tensile Strength: The minimum tensile strength of P355NH is 490-630 MPa, while for P355GH it is 510-650 MPa.

2. Yield Strength: The minimum yield strength of P355NH is 355 MPa, while for P355GH it is 355 MPa.

3. Elongation: The minimum elongation of P355NH is 22%, while for P355GH it is 22%.

4. Impact Energy: The minimum impact energy of P355NH is 27 Joules at -20°C, while for P355GH it is 27 Joules at 0°C.

5. Hardness: The maximum hardness of P355NH is 240 HB, while for P355GH it is 230 HB.

These mechanical properties determine the strength, ductility, and toughness of the materials, which are important factors in various applications such as pressure vessels, oil and gas industry, and power plants.

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