Low price but high quality 4130 steel tube from Changzhou China

Low price but high quality 4130 steel tube from Changzhou China
4130 Alloy Chromoly Steel PipeChemical Composition(%)Mechanical PropertyCSiMnSPCrNiCuMoYield StrengthTensile Strength( σs )( σb )0.28~0.33 0.15~0.30 0.40~0.60≤0.04≤0.035≤0.150.80~1.10/ 0.15~0.25≥785(80)
(MPa)≥930(95)(MPa)End ShapeBeveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's requirementsSurfaceOiled, Galvanized, Phosphate etcTreatmentTechniqueCold drawnApplication1. Automotive and mechanical pipes2. Petroleum cracking pipes3. High Pressure Boiler Pipe4. Low and middle pressure fluid transportation pipeline5. Chemical fertilizer equipment pipes6. Heat exchanger pipesDelivery1. BK (+C)No heat treatment after last cold forming process.Conditions2. 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 acontrolled atmosphere.Package1. 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
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