{"id":2362,"date":"2026-04-13T11:37:03","date_gmt":"2026-04-13T03:37:03","guid":{"rendered":"https:\/\/www.gsnewmaterial.com\/?p=2362"},"modified":"2026-04-24T13:49:18","modified_gmt":"2026-04-24T05:49:18","slug":"seamless-honed-tube-sht-20-05-20-steel-id-30-80mm-h9-gb-t-8162","status":"publish","type":"post","link":"https:\/\/www.gsnewmaterial.com\/es\/seamless-honed-tube-sht-20-05-20-steel-id-30-80mm-h9-gb-t-8162.html","title":{"rendered":"Seamless Honed Tube SHT-20#-05 (20# Steel, ID 30-80mm, H9, GB\/T 8162)"},"content":{"rendered":"
\n

Product Description<\/h3>\n

What is a Seamless Honed Tube?<\/h3>\n

A\u00a0Seamless Honed Tube<\/strong>\u00a0is a high-quality hydraulic cylinder barrel manufactured from\u00a0seamless steel tubes<\/strong>\u00a0(no longitudinal or spiral weld seam) that undergo:<\/p>\n

    \n
  1. \n

    Cold Drawing or Hot Rolling<\/strong>\u00a0\u2013 to achieve precise dimensions<\/p>\n<\/li>\n

  2. \n

    Internal Honing<\/strong>\u00a0\u2013 to create a smooth, mirror-like inner surface<\/p>\n<\/li>\n<\/ol>\n

    The\u00a0absence of any weld seam<\/strong>\u00a0is the defining characteristic. Unlike welded and drawn tubes, seamless honed tubes have\u00a0uniform wall thickness, consistent material properties, and no weak points<\/strong>\u00a0along the length.<\/p>\n<\/div>\n

    \"\"<\/div>\n

    Key Specifications<\/h3>\n
    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Parameter<\/b><\/strong><\/td>\nValue<\/b><\/strong><\/td>\n<\/tr>\n
    Product Name<\/strong><\/td>\nSeamless Honed Tube<\/td>\n<\/tr>\n
    Material<\/strong><\/td>\n[ST52 \/ E355 \/ 45# \/ 20# \/ SAE 4140 \/ 27SiMn \/ CK45 \/ SAE 1026]<\/td>\n<\/tr>\n
    Outer Diameter (OD)<\/strong><\/td>\n50 \u2013 200 mm<\/td>\n<\/tr>\n
    Inner Diameter (ID)<\/strong><\/td>\n40 \u2013 180 mm<\/td>\n<\/tr>\n
    Wall Thickness<\/strong><\/td>\n5 \u2013 22 mm<\/td>\n<\/tr>\n
    Tolerance Grade<\/strong><\/td>\nH8 (standard) \/ H9 (economic) \/ H7 (upon request)<\/td>\n<\/tr>\n
    Surface Roughness (Ra)<\/strong><\/td>\n\u2264 0.4 \u03bcm (standard) \/ \u2264 0.2 \u03bcm (upon request)<\/td>\n<\/tr>\n
    Straightness<\/strong><\/td>\n\u2264 0.5 mm per meter<\/td>\n<\/tr>\n
    Length<\/strong><\/td>\n6 meters (standard) \/ 3 \u2013 12 meters (customized)<\/td>\n<\/tr>\n
    No Weld Seam<\/strong><\/td>\n100% seamless \u2013 no longitudinal or spiral weld<\/td>\n<\/tr>\n
    Delivery Condition<\/strong><\/td>\nBK+S (stress relieved) \/ NBK (normalized) \/ BK (cold drawn hard)<\/td>\n<\/tr>\n
    End Finish<\/strong><\/td>\nPlastic caps + anti-rust oil<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    Why Choose Seamless Honed Tubes?<\/h3>\n
    \n
    \n
    <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n
    Advantage<\/th>\nDescription<\/th>\n<\/tr>\n<\/thead>\n
    No Weld Seam Weakness<\/strong><\/td>\nEliminates risk of seam failure under high pressure or fatigue loading<\/td>\n<\/tr>\n
    Superior Pressure Rating<\/strong><\/td>\nCan withstand higher working pressures compared to welded tubes<\/td>\n<\/tr>\n
    Uniform Wall Thickness<\/strong><\/td>\nNo wall thickness variation at weld zone \u2013 consistent strength<\/td>\n<\/tr>\n
    Excellent Fatigue Life<\/strong><\/td>\nNo weld heat-affected zone (HAZ) \u2013 better resistance to cyclic loading<\/td>\n<\/tr>\n
    Wider Size Range<\/strong><\/td>\nAvailable in larger diameters and thicker walls than welded tubes<\/td>\n<\/tr>\n
    Full Traceability<\/strong><\/td>\nHeat number traceable from raw material to finished tube<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    Seamless vs. Welded Comparison<\/h3>\n
    \n\n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nSeamless Honed Tube<\/th>\nWelded & Drawn (DIN 2393)<\/th>\n<\/tr>\n<\/thead>\n
    Weld seam<\/strong><\/td>\nNone \u2013 100% seamless<\/td>\nLongitudinal weld seam present<\/td>\n<\/tr>\n
    Maximum working pressure<\/strong><\/td>\nHigher (up to 500 bar)<\/td>\nLower (limited by weld integrity)<\/td>\n<\/tr>\n
    Fatigue resistance<\/strong><\/td>\nExcellent<\/td>\nModerate (weakest at weld)<\/td>\n<\/tr>\n
    Wall thickness uniformity<\/strong><\/td>\nConsistent full circumference<\/td>\nSlight variation at weld zone<\/td>\n<\/tr>\n
    Size range<\/strong><\/td>\nID up to 800mm+<\/td>\nID typically \u2264 150mm<\/td>\n<\/tr>\n
    Material grades<\/strong><\/td>\nWide range including alloys<\/td>\nLimited to lower carbon grades<\/td>\n<\/tr>\n
    Cost<\/strong><\/td>\nHigher<\/td>\nLower<\/td>\n<\/tr>\n
    Typical application<\/strong><\/td>\nHigh-pressure, heavy-duty, safety-critical<\/td>\nLight to medium duty, cost-sensitive<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    For critical applications involving high pressure, shock loading, or safety requirements, seamless is the preferred choice.<\/em><\/p>\n<\/blockquote>\n

    \n

    Available Materials & Standards<\/h3>\n
    \n
    \n
    <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n
    Material Grade<\/th>\nStandard<\/th>\nKey Properties<\/th>\nTypical Application<\/th>\n<\/tr>\n<\/thead>\n
    ST52 \/ E355<\/strong><\/td>\nDIN 2391 \/ EN 10305-1<\/td>\nHigh strength, excellent toughness<\/td>\nMost common seamless cylinder tube<\/td>\n<\/tr>\n
    45# \/ CK45<\/strong><\/td>\nGB\/T 8713 \/ DIN 2391<\/td>\nMedium carbon, wear resistant<\/td>\nHeavy-duty industrial cylinders<\/td>\n<\/tr>\n
    SAE 4140<\/strong><\/td>\nASTM A519<\/td>\nCr-Mo alloy, ultra-high strength<\/td>\nHigh-pressure, high-temperature<\/td>\n<\/tr>\n
    27SiMn<\/strong><\/td>\nGB\/T 17396<\/td>\nManganese-silicon alloy<\/td>\nMining, construction equipment<\/td>\n<\/tr>\n
    20# \/ SAE 1020<\/strong><\/td>\nGB\/T 8162 \/ ASTM A519<\/td>\nLow carbon, good weldability<\/td>\nWelded end connections<\/td>\n<\/tr>\n
    SAE 1026<\/strong><\/td>\nASTM A519<\/td>\nHigher carbon than 1020<\/td>\nGeneral hydraulic cylinders<\/td>\n<\/tr>\n
    E355<\/strong><\/td>\nEN 10305-1<\/td>\nFine grain, superior toughness<\/td>\nDynamic load applications<\/td>\n<\/tr>\n
    Q355B<\/strong><\/td>\nGB\/T 1591<\/td>\nChinese standard equivalent to ST52<\/td>\nCost-effective alternative<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    Standard Size Range<\/h3>\n

    Below is our common size range for seamless honed tubes. Custom sizes available upon request.<\/em><\/p>\n

    \n
    \n
    <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    ID (mm)<\/th>\nOD (mm)<\/th>\nWall Thickness (mm)<\/th>\nMax Working Pressure (bar)*<\/th>\n<\/tr>\n<\/thead>\n
    40<\/td>\n50 \u2013 55<\/td>\n5.0 \u2013 7.5<\/td>\n350 \u2013 420<\/td>\n<\/tr>\n
    50<\/td>\n60 \u2013 65<\/td>\n5.0 \u2013 7.5<\/td>\n350 \u2013 420<\/td>\n<\/tr>\n
    63<\/td>\n73 \u2013 80<\/td>\n5.0 \u2013 8.5<\/td>\n300 \u2013 400<\/td>\n<\/tr>\n
    80<\/td>\n90 \u2013 100<\/td>\n5.0 \u2013 10.0<\/td>\n280 \u2013 400<\/td>\n<\/tr>\n
    100<\/td>\n115 \u2013 125<\/td>\n7.5 \u2013 12.5<\/td>\n280 \u2013 420<\/td>\n<\/tr>\n
    125<\/td>\n140 \u2013 152<\/td>\n7.5 \u2013 13.5<\/td>\n280 \u2013 420<\/td>\n<\/tr>\n
    140<\/td>\n156 \u2013 168<\/td>\n8.0 \u2013 14.0<\/td>\n250 \u2013 400<\/td>\n<\/tr>\n
    160<\/td>\n180 \u2013 190<\/td>\n10.0 \u2013 15.0<\/td>\n250 \u2013 380<\/td>\n<\/tr>\n
    180<\/td>\n200 \u2013 220<\/td>\n10.0 \u2013 20.0<\/td>\n250 \u2013 450<\/td>\n<\/tr>\n
    200<\/td>\n220 \u2013 245<\/td>\n10.0 \u2013 22.5<\/td>\n230 \u2013 450<\/td>\n<\/tr>\n
    220<\/td>\n250 \u2013 273<\/td>\n15.0 \u2013 26.5<\/td>\n280 \u2013 480<\/td>\n<\/tr>\n
    250<\/td>\n280 \u2013 325<\/td>\n15.0 \u2013 37.5<\/td>\n250 \u2013 500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    Maximum working pressure is approximate, based on ST52 material with 4:1 safety factor. Actual depends on material, tolerance, and application.<\/em><\/p>\n<\/blockquote>\n

    \n

    Custom Sizes<\/strong>: ID from 30mm to 800mm, any OD\/WT combination available. Minimum order quantity may apply.<\/p>\n<\/blockquote>\n

    Technical Features<\/h3>\n
    \n
    \n
    <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nValue \/ Description<\/th>\n<\/tr>\n<\/thead>\n
    Manufacturing method<\/strong><\/td>\nHot rolled seamless + cold drawn + honed<\/td>\n<\/tr>\n
    Honing method<\/strong><\/td>\nFixed multi-stone honing head<\/td>\n<\/tr>\n
    Surface roughness (Ra)<\/strong><\/td>\n0.2\u03bcm \u2013 0.8\u03bcm<\/td>\n<\/tr>\n
    ID tolerance<\/strong><\/td>\nH7, H8, H9 (ISO 286-2)<\/td>\n<\/tr>\n
    Roundness<\/strong><\/td>\n\u2264 50% of ID tolerance<\/td>\n<\/tr>\n
    Wall thickness tolerance<\/strong><\/td>\n\u00b15% \u2013 \u00b110% (depending on standard)<\/td>\n<\/tr>\n
    Straightness<\/strong><\/td>\n\u2264 0.5mm per meter, \u2264 0.8mm per 3 meters<\/td>\n<\/tr>\n
    Hardness (BK+S)<\/strong><\/td>\n180 \u2013 240 HB (ST52) \/ 200 \u2013 280 HB (4140)<\/td>\n<\/tr>\n
    Tensile strength (ST52)<\/strong><\/td>\n520 \u2013 680 MPa<\/td>\n<\/tr>\n
    Yield strength (ST52)<\/strong><\/td>\n\u2265 420 MPa<\/td>\n<\/tr>\n
    Elongation (ST52)<\/strong><\/td>\n\u2265 20%<\/td>\n<\/tr>\n
    Maximum working pressure<\/strong><\/td>\nUp to 500 bar (depending on dimensions)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
    \n

    Quality Assurance<\/h3>\n

    Raw Material Control<\/h3>\n
      \n
    • \n

      Mill Test Certificate<\/strong>\u00a0(MTC) from steel mill<\/p>\n<\/li>\n

    • \n

      Chemical composition<\/strong>\u00a0verified per heat number<\/p>\n<\/li>\n

    • \n

      Mechanical properties<\/strong>\u00a0tested per batch<\/p>\n<\/li>\n<\/ul>\n

      In-Process Inspection<\/h3>\n
        \n
      • \n

        Dimensional checks<\/strong>\u00a0after cold drawing<\/p>\n<\/li>\n

      • \n

        UT\/ECT<\/strong>\u00a0for surface defects (optional)<\/p>\n<\/li>\n

      • \n

        Hardness testing<\/strong>\u00a0after heat treatment<\/p>\n<\/li>\n<\/ul>\n

        Final Inspection (100%)<\/h3>\n
          \n
        • \n

          ID measurement<\/strong>\u00a0\u2013 Air gauge or electronic plug gauge<\/p>\n<\/li>\n

        • \n

          Surface roughness<\/strong>\u00a0\u2013 Profilometer<\/p>\n<\/li>\n

        • \n

          Visual inspection<\/strong>\u00a0\u2013 Borescope for internal surface<\/p>\n<\/li>\n

        • \n

          Straightness<\/strong>\u00a0\u2013 Laser or straight edge<\/p>\n<\/li>\n<\/ul>\n

          Documentation Provided<\/h3>\n
            \n
          • \n

            \u2705\u00a0EN 10204 3.1<\/strong>\u00a0\u2013 Material certificate with batch traceability<\/p>\n<\/li>\n

          • \n

            \u2705\u00a0COA (Certificate of Analysis)<\/strong>\u00a0\u2013 Full chemical & mechanical properties<\/p>\n<\/li>\n

          • \n

            \u2705\u00a0Inspection Report<\/strong>\u00a0\u2013 ID, tolerance, roundness, straightness, Ra<\/p>\n<\/li>\n

          • \n

            \u2705\u00a0Hydrostatic test report<\/strong>\u00a0(if applicable)<\/p>\n<\/li>\n<\/ul>\n

            Certifications<\/h3>\n
              \n
            • \n

              \u2705\u00a0ISO 9001:2015<\/strong>\u00a0\u2013 Quality management<\/p>\n<\/li>\n

            • \n

              \u2705\u00a0Third-party inspection<\/strong>\u00a0(SGS \/ BV \/ TUV \/ DNV) available<\/p>\n<\/li>\n

            • \n

              \u2705\u00a0ABS \/ LR \/ DNV<\/strong>\u00a0marine certification available upon request<\/p>\n<\/li>\n<\/ul>\n

              \n

              Pressure Rating Reference (ST52 Material)<\/h3>\n
              \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
              ID (mm)<\/th>\nWall Thickness (mm)<\/th>\nWorking Pressure (bar)*<\/th>\nBurst Pressure (bar)*<\/th>\n<\/tr>\n<\/thead>\n
              50<\/td>\n5.0<\/td>\n320<\/td>\n1280<\/td>\n<\/tr>\n
              50<\/td>\n7.5<\/td>\n450<\/td>\n1800<\/td>\n<\/tr>\n
              80<\/td>\n6.0<\/td>\n250<\/td>\n1000<\/td>\n<\/tr>\n
              80<\/td>\n10.0<\/td>\n380<\/td>\n1520<\/td>\n<\/tr>\n
              100<\/td>\n7.5<\/td>\n250<\/td>\n1000<\/td>\n<\/tr>\n
              100<\/td>\n12.5<\/td>\n380<\/td>\n1520<\/td>\n<\/tr>\n
              125<\/td>\n8.0<\/td>\n220<\/td>\n880<\/td>\n<\/tr>\n
              125<\/td>\n13.5<\/td>\n340<\/td>\n1360<\/td>\n<\/tr>\n
              160<\/td>\n10.0<\/td>\n210<\/td>\n840<\/td>\n<\/tr>\n
              160<\/td>\n15.0<\/td>\n290<\/td>\n1160<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
              \n

              Calculated with safety factor 4:1, using ST52 yield strength \u2265420MPa. For actual design, please consult engineering standards.<\/em><\/p>\n<\/blockquote>\n

              \n

              Packing & Delivery<\/h3>\n
              \n\n\n\n\n\n\n\n\n\n\n\n
              Packing Method<\/th>\nDescription<\/th>\n<\/tr>\n<\/thead>\n
              Rust protection<\/strong><\/td>\nAnti-rust oil (inside + outside)<\/td>\n<\/tr>\n
              End protection<\/strong><\/td>\nHeavy-duty plastic caps (both ends)<\/td>\n<\/tr>\n
              Interleaving<\/strong><\/td>\nKraft paper between tube layers<\/td>\n<\/tr>\n
              Bundling<\/strong><\/td>\nSteel straps with edge protectors, 500 \u2013 2000 kg per bundle<\/td>\n<\/tr>\n
              Outer packing<\/strong><\/td>\nWaterproof woven fabric + moisture barrier<\/td>\n<\/tr>\n
              Optional premium packing<\/strong><\/td>\nIndividual PVC sleeve + plywood crates<\/td>\n<\/tr>\n
              Container loading<\/strong><\/td>\n20ft GP \/ 40ft HC \/ 40ft OT (open top for long lengths)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

              Delivery Time<\/strong>:<\/p>\n

                \n
              • \n

                Stock sizes (common IDs): 7 \u2013 15 days<\/p>\n<\/li>\n

              • \n

                Custom sizes: 20 \u2013 35 days<\/p>\n<\/li>\n

              • \n

                Large quantities (>100 tons): 30 \u2013 45 days<\/p>\n<\/li>\n<\/ul>\n

                Incoterms<\/strong>: EXW, FOB, CIF, CFR, DDP \u2013 flexible<\/p>\n

                Why Choose Our Seamless Honed Tubes<\/h3>\n
                \n
                \n
                <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n
                Reason<\/th>\nDetail<\/th>\n<\/tr>\n<\/thead>\n
                True seamless<\/strong><\/td>\n100% seamless \u2013 no weld seam risk<\/td>\n<\/tr>\n
                Large size capability<\/strong><\/td>\nID up to 800mm, wall up to 50mm<\/td>\n<\/tr>\n
                Wide material range<\/strong><\/td>\nCarbon, alloy, and stainless steel available<\/td>\n<\/tr>\n
                Strict QC<\/strong><\/td>\n100% dimensional inspection before shipment<\/td>\n<\/tr>\n
                Competitive pricing<\/strong><\/td>\nDirect from manufacturer<\/td>\n<\/tr>\n
                Short lead time<\/strong><\/td>\nLarge inventory of raw seamless tubes<\/td>\n<\/tr>\n
                Global shipping<\/strong><\/td>\nExported to 50+ countries<\/td>\n<\/tr>\n
                Technical support<\/strong><\/td>\nEngineering team for pressure rating and material selection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
                \n

                Typical Applications<\/h3>\n
                \n
                \n
                <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                Industry<\/th>\nApplication<\/th>\nRecommended Material<\/th>\n<\/tr>\n<\/thead>\n
                Hydraulic Cylinders<\/strong><\/td>\nHeavy-duty, telescopic, tie-rod cylinders<\/td>\nST52 \/ E355<\/td>\n<\/tr>\n
                Construction Equipment<\/strong><\/td>\nExcavators, loaders, bulldozers, backhoes<\/td>\n27SiMn \/ ST52<\/td>\n<\/tr>\n
                Mining Equipment<\/strong><\/td>\nDump truck cylinders, roof supports<\/td>\n27SiMn \/ SAE 4140<\/td>\n<\/tr>\n
                Marine & Offshore<\/strong><\/td>\nSteering gear, hatch covers, deck machinery<\/td>\nST52 (with coating) \/ SS316<\/td>\n<\/tr>\n
                Agricultural Machinery<\/strong><\/td>\nTractor cylinders, harvesters<\/td>\n45# \/ ST52<\/td>\n<\/tr>\n
                Material Handling<\/strong><\/td>\nForklift mast, scissor lifts, cranes<\/td>\nST52 \/ E355<\/td>\n<\/tr>\n
                Presses & Machine Tools<\/strong><\/td>\nHydraulic presses, injection molding machines<\/td>\nSAE 4140 \/ ST52<\/td>\n<\/tr>\n
                Oil & Gas<\/strong><\/td>\nWellhead equipment, blowout preventers<\/td>\nSAE 4140 \/ L80<\/td>\n<\/tr>\n
                Wind Energy<\/strong><\/td>\nPitch and yaw cylinders<\/td>\nST52 \/ E355 (low temp)<\/td>\n<\/tr>\n
                Railway<\/strong><\/td>\nBrake cylinders, suspension components<\/td>\nE355<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
                \n

                Technical Data Sheet (Reference)<\/h3>\n

                *For ST52 \/ E355 material, H8 tolerance, BK+S condition, 6m length:*<\/p>\n

                \n
                \n
                <\/div>\n<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                ID (mm)<\/th>\nOD (mm)<\/th>\nWT (mm)<\/th>\nWeight (kg\/m)<\/th>\nID Tolerance H8 (\u03bcm)<\/th>\nRa (\u03bcm)<\/th>\n<\/tr>\n<\/thead>\n
                40<\/td>\n50<\/td>\n5.0<\/td>\n5.55<\/td>\n+39 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                50<\/td>\n60<\/td>\n5.0<\/td>\n6.78<\/td>\n+39 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                63<\/td>\n76<\/td>\n6.5<\/td>\n11.14<\/td>\n+46 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                80<\/td>\n95<\/td>\n7.5<\/td>\n16.18<\/td>\n+46 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                100<\/td>\n114<\/td>\n7.0<\/td>\n18.47<\/td>\n+54 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                125<\/td>\n140<\/td>\n7.5<\/td>\n24.51<\/td>\n+54 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                140<\/td>\n159<\/td>\n9.5<\/td>\n35.01<\/td>\n+63 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                160<\/td>\n180<\/td>\n10.0<\/td>\n41.92<\/td>\n+63 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                180<\/td>\n203<\/td>\n11.5<\/td>\n54.31<\/td>\n+72 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n
                200<\/td>\n219<\/td>\n9.5<\/td>\n49.07<\/td>\n+72 \/ 0<\/td>\n\u2264 0.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
                \n

                Full technical data sheet available upon request for all sizes and materials.<\/em><\/p>\n<\/blockquote>\n

                Main Applications<\/h2>\n
                  \n
                • Hydraulic & Pneumatic<\/strong>: Hydraulic cylinder barrels, air cylinders, power unit pipes<\/li>\n
                • Construction Machinery<\/strong>: Excavators, loaders, cranes, road rollers<\/li>\n
                • Automotive & Rail<\/strong>: Shock absorber cylinders, steering cylinders<\/li>\n
                • Petrochemical<\/strong>: High-pressure fluid pipes, anti-corrosion honed pipelines<\/li>\n
                • Precision Machinery<\/strong>: CNC machine tool shafts, injection molding machine parts<\/li>\n
                • Energy Equipment<\/strong>: Wind turbine cylinders, hydraulic support columns<\/li>\n<\/ul>\n
                  \"\"<\/div>\n

                  Why Choose Us?<\/h2>\n
                  <\/div>\n
                    \n
                  • Factory Direct Sales<\/strong> with large stock and competitive prices.<\/li>\n
                  • Full Inspection<\/strong>: chemical composition, mechanical properties, size, roughness, straightness tested piece by piece.<\/li>\n
                  • Fast Customization<\/strong>: accept drawings for special size, length, material and surface treatment (chrome plating, roller burnishing).<\/li>\n
                  • Quick Delivery<\/strong>: stock items ship in 48 hours; custom orders 7\u201315 days.<\/li>\n
                  • Technical Support<\/strong> for material selection and application matching.<\/li>\n<\/ul>\n
                    <\/div>\n

                    FAQ<\/h2>\n
                    <\/div>\n
                    \n

                    Q: What is the difference between honed tube, seamless pipe and burnished tube?<\/p>\n

                    <\/div>\n

                    A: Honed tube has higher precision and better roundness<\/strong>, ideal for long-term seal friction \u2013 the best choice for hydraulic cylinders.<\/p>\n<\/div>\n

                    <\/div>\n
                    \n

                    Q: How to choose material?<\/p>\n

                    <\/div>\n

                    A: Low pressure: 20# \/ 45#; Medium-high pressure: 40Cr \/ 27SiMn; Corrosive environment: 304 \/ 316.<\/p>\n<\/div>\n

                    <\/div>\n
                    \n

                    Q: Do you supply samples and small orders?<\/p>\n

                    <\/div>\n

                    A: Yes, we support sample orders, small-batch trials and cut-to-length service<\/strong>.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

                    Product Description What is a Seamless Honed Tube? A\u00a0Seamless Honed Tube\u00a0is a high-quality hydraulic cylinder barrel manufactured from\u00a0seamless steel tubes\u00a0(no longitudinal or spiral weld seam) that undergo: Cold Drawing or Hot Rolling\u00a0\u2013 to achieve precise dimensions Internal Honing\u00a0\u2013 to create a smooth, mirror-like inner surface The\u00a0absence of any weld seam\u00a0is the defining characteristic. Unlike welded […]<\/p>","protected":false},"author":2,"featured_media":2367,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[7,25],"tags":[],"class_list":["post-2362","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-center","category-seamless-honed-tubes"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/posts\/2362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/comments?post=2362"}],"version-history":[{"count":1,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/posts\/2362\/revisions"}],"predecessor-version":[{"id":2377,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/posts\/2362\/revisions\/2377"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/media\/2367"}],"wp:attachment":[{"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/media?parent=2362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/categories?post=2362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gsnewmaterial.com\/es\/wp-json\/wp\/v2\/tags?post=2362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}