P355NH is a pressure vessel steel grade that is commonly used for applications in elevated temperature service. Its mechanical properties are as follows:

[ad_1] P355NH is a pressure vessel steel grade with a minimum yield strength of 355MPa. It is primarily used in industrial and power plant applications where high-pressure and high-temperature environments are encountered.

The mechanical properties of P355NH are as follows:

1. Tensile Strength: The minimum tensile strength of P355NH is 490-630MPa, depending on the thickness of the plate.

2. Yield Strength: The minimum yield strength of P355NH is 355MPa, which means it can withstand a certain amount of stress before undergoing plastic deformation.

3. Elongation: The minimum elongation at break of P355NH is 22% for longitudinal samples and 19% for transverse samples. This indicates the ability of the material to stretch before breaking.

4. Charpy Impact Kontrol: P355NH is tested for its ability to absorb energy in a Charpy impact kontrol. The minimum impact energy required is 27 Joules at -20°C.

5. Reduction in Area: The minimum reduction in area after fracture is 40% for longitudinal samples and 35% for transverse samples. This indicates the ductility of the material.

Overall, P355NH exhibits good mechanical properties, including high tensile strength and yield strength, as well as good elongation and impact resistance. These properties make it suitable for applications in pressure vessels and boilers where strength and toughness are crucial.
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