Hot Rolled steel pipe
Table 1- Chemical composition
|Cr %||Mo %|
Beveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's
Oiled, Galvanized, Phosphate etc
Cold drawn & cold rolled
1. BK (+C)
No heat treatment after last cold forming process.
2. BKW (+LC)
After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR)
After the final cold forming process the tubes are stress relieve annealed.
4. GBK (+A)
After the final cold forming process the tubes are annealed in a controlled atmosphere.
5. NBK (+N)
After the final cold forming process the tubes are annealed above the upper transformation
point in a controlled atmosphere.
1. Bundle Packing.
2. Plain end or vanished as per customer's request.
3. Wrapped in waterproof paper.
4. Sackcloth with several steel strips.
5. Pack in heavy tri-wall boxes.