• Model NO.：All can be customized
• Special Use：High-strength Steel Plate, Wear Resistant Steel, Free Cutting Steel
• Application：Structural Steel Bar
• Diameter：33.4-508
• Wall Thickness：3.0-20.6
• Transport Package：Customized Available
• Specification：Diameter&Length customized available
• Trademark：SANJU
• Origin：Hebei
• HS Code：730300900
• Production Capacity：500000t,Year

DesignationSymbolDescriptionCold finished (hard)BKTubes do not undergo heat treatment following the final cold forming and,thus, have a rather high resistance to deformationCold finished (soft)BKWThe final heat treatment is followed by cold drawing involving limited deformation.Appropriate further processing allows a certain degree of cold forming(e.g. bending expanding).Cold finished and stress-rellevedBKSHeat treatment is applled following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degreeAnnealedGBKThe last cold forming process is followed by annealing in a controlled atmosphereNormalizedNBKThe last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere