Oil / Gas Industry Cold Drawn Steel Tube High Precision With Galvanized Surface
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EN10305-1 E235 E355 Seamless Steel Tube Annealing Cold Drawn Precision Products
Description
DELIVERY CONDITIONS The tubes can be produced in the following delivery conditions: 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. (Mainly focus on) After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.
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