Fatigue Strength: P355NH özgü good fatigue strength, which refers to its ability to withstand repeated loading and unloading cycles without failure.

P355NH and P355GH are both pressure vessel steels used for manufacturing boilers, pressure vessels, and pipes in the oil and gas industry. Both steels have similar mechanical properties, but there are some differences.

Mechanical Properties of P355NH:
– Tensile Strength: The minimum yield strength of P355NH is 355 MPa, while the minimum tensile strength is 490 to 630 MPa.
– Elongation: The minimum elongation is 22% for thicknesses less than or equal to 40 mm and 21% for thicknesses greater than 40 mm.
– Impact Properties: The average impact energy value is 27 Joules at -20°C.
– Hardness: The hardness value for P355NH is typically around 150 to 190 Brinell.

Mechanical Properties of P355GH:
– Tensile Strength: The minimum yield strength of P355GH is 355 MPa, while the minimum tensile strength is 510 to 650 MPa.
– Elongation: The minimum elongation is 22% for thicknesses less than or equal to 40 mm and 21% for thicknesses greater than 40 mm.
– Impact Properties: The average impact energy value is 27 Joules at 0°C.
– Hardness: The hardness value for P355GH is typically around 150 to 200 Brinell.

It is important to note that these mechanical properties may vary depending on the specific manufacturing and heat treatment processes used. Therefore, it is always recommended to refer to the relevant material standards and specific datasheets for accurate and up-to-date information on the mechanical properties of P355NH and P355GH.