The difference between S355K2+N and S355J2+N

Katalor can offers stock of S355K2+N and S355J2+N, in this artical we introduce the difference of S355K2+N steel and S355J2+N from application and performance:
According to the performance S355K2+N and S355J2+N are equal with Chinese grade Q345E and Q345D, but S355 required upper yield strength, this part is different from Chinese standard.
K2 required -40℃ impact, J2 requried impact test at -20℃.
+N means normalizing rolling, normalizing rolling can be understand as follows: finish rolling temperature of 900 degrees, and then air cooling (simulated normalizing heat treatment cooling process), performance is similar with normalizing heat treatment.
Because it is not carried out Controlled rolling, Control cold, so the same chemical component the strength is lower than Q345D/E; general S355k2 + N / S355J2 + N requirements of the required chemical composition are more than Q345D / E.
S355K2+N and S355J2+N steel are equal with Chinese grade Q345E and Q345D, +N means normalizing rolling, but not means it must needs normalizing, just a method of naming steel in the standard. Q345 production according GBT, S355K2+N according to EN10025.
S355K2 + N is EN standard low alloy plate are widely used, S355K2 + N EN standard low alloy plate is used for the manufacture of various types of construction machinery, such as mining and all kinds of construction with the drilling rig, shovel, electric wheel dump truck, mining car , Excavators, loaders, bulldozers, all kinds of cranes, coal mine hydraulic support and other mechanical equipment and other structural parts.
More information about the difference of S355J2+N and S355J2+N you can contact us at any time.

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