E355 NBK Phosphated Seamless Tube
Seamless cold drawn E355 high quality tubing, cleaned, plugged, normalised, free of scale, phosphated& oiled to Din 2391 Sheet 2 grade C.
•Seamless tubing is especially suited to cold bending & flaring,
•Weldable by all recognised welding methods,
•Normalised (NBK).
•Seamless tubing is annealled, phosphated & oiled.
•Tubing supplied with plastic plugs in ends
•Available Ex stock for immediate delivery in standard dimensions
• Tubeavailable in 6 metre lengths
Delivery conditions and heat treatment
BK (+C) Cold finished/hard (cold finished as drawn). No heat treatment after the last cold forming process
BKW (+LC) Cold finished/soft (lightly cold worked). After the last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed. After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed. After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere
Steel grades
Steel is produced in electric arc furnace and is fully killed. chemical composition as below
