0.25" E355 DIN 2391 EN10305-1 Seamless And Welded Precision Steel Tubes

Application : Hydraulic tubes.

Material: E235 St35 St45 St52 E355

Standard : DIN 2391 EN10305-1

Surface treatment: Galvanizing, to protect material from rust.

Precision seamless steel pipe as per DIN 2391 and EN 10305-1 ,there will be delivery condition :

BK: No heat treatment atfer the last cold-forming process.The tubes therefore have only low deformability.

BKW:After the last heat treatment there is a light finishing pass(cold drawing) with proper subsequent processing.the tube can be 

Cold-formed(e.g.bent,expanded)within certain limits.

GBK:After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.

NBK:The tubes are annealed above the upper transformation point in a controlled almosphere or under vacuum.

+C: No heat treatment after the final cold drawing process.

+LC:After the final heat treatment there is a suitable drawing pass.

+SR:After the final cold drawing process there is a stress relief heat treatment in a controlled atmosphere.

+A:After the final cold drawing process the tubes are annealed in a controlled atmosphere.

+N:After the final cold drawing operation,the tubes are normalized in a controlled atmosphere;