DIN2391 ST52.4 NBK Precision Cold Drawn Seamless Tubes
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DIN2391 Precision Cold Drawn Seamless Pipes and Tubes, Gr St35 St45 St52 St37.4, Cold Finished Seamless Pipe use for Hydraulic and Pneumatic. Delivery Status: NBK (+N) BKW (+LC) GBK (+A) BKS (+SR) BK (+C) OD x WT = 4~120 x 0.5~15mm DIN2391 St52.4+N Phosphated Hydraulic Tube
DIN 2391 ST52.4 NBK Precision Cold Drawn Seamless Tubes are high-strength, high-precision steel tubes that are normalized to improve their mechanical properties and dimensional stability. They are characterized by tight dimensional tolerances, a smooth surface finish, and excellent mechanical properties, making them suitable for demanding applications in hydraulic systems, automotive, mechanical engineering, construction, energy, and aerospace industries. The seamless construction and cold-drawing process ensure uniformity and reliability, while the normalizing treatment enhances toughness and machinability.
Description: Precision steel tube Grade: St 30 Si / St 30 Al / St 35 / St37 / St37.4 / St45 / St 52 / St52.4 / E215 / E235 / E355 Precision in size,Bright for the surface, high ability of
mechanical performance Standard: DIN 2391, EN10305-1, EN10305-4, BS 6323, ISO 8535 DIN2391 Precision steel pipe STEEL GRADE: ST30Si, ST30Al, ST35, ST37, ST37.4, ST45, ST52,
ST52.4, etc Size:(mm) Out Dimensions: 6 mm ~ 350 mm Wall Thickness: 0.8 mm ~30mm Length: Fixed(6m,9m,12,24m) or normal length(5-12m)
Final supply conditions:
Cold finished(hard)BK Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished(soft)BKW The 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-relieved BKS Heat treatment is applied 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 degree.
Annealed GBK The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized NBK The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.
Chemical Composition:
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