EN S355J2N Z25 steel plate toughness requirements and practical significance

The requirements for toughness of EN S355J2N Z25 steel plate in the EN standard usually include the following:

1. Impact test: Usually through impact test (such as Charpy V impact test) to evaluate the toughness of EN S355J2N Z25 steel plate at different temperatures to ensure that it can withstand the impact and not easily break under low temperature environment or stress.

2. Plastic toughness: The material is required to have good plastic deformation ability in tensile and other tests to ensure that plastic deformation can occur when subjected to external loading without immediate rupture.

3. Ductility: The material is required to have a certain ductility, which can produce large deformation during the stretching process and is not easy to break, ensuring that the structure can form local deformation without breaking when it is squeezed or bent.

Practical implications include:

1. Safety: High toughness can ensure that the structure is not prone to damage when subjected to external shock or vibration, improving the safety of use.

2. Durability: Good toughness can extend the service life of materials and reduce maintenance and replacement costs.

3. Processability: EN S355J2N Z25 steel plate with excellent toughness is easier to cut, weld and form, improve production efficiency.

4. Earthquake resistance: in the case of earthquakes and other disasters, high-toughness materials can effectively reduce the risk of structural damage and ensure the stability of buildings and equipment.

In summary, the toughness requirements of EN S355J2N Z25 steel plate cover impact test, plastic toughness and ductility, etc., and have important practical significance, involving the safety, durability and processing performance of the structure.