Cold-Drawn Seamless Steel Pipes, also known as precision-drawn tubes or cold-finished seamless pipes, represent our high-precision product line manufactured through advanced cold-drawing technology. These precision cold-drawn tubes are produced by drawing seamless steel billets through precision dies at room temperature, resulting in superior dimensional acc
The cold-drawing manufacturing process delivers exceptional wall thickness uniformity and outstanding surface smoothness, making these precision-drawn seamless pipes ideal for applications requiring tight tolerance control and superior surface quality. These high-precision cold-drawn tubes demonstrate remarkable mechanical strength and improved structural reliability, maintaining consistent performance in high-pressure environments, high-frequency loading conditions, and demanding operational scenarios where material integrity and dimensional stability are critical.
Our cold-drawn precision tubes excel in mechanical manufacturing applications including gear components, shaft parts, and connecting rod assemblies where precise dimensional requirements and excellent load-bearing capacity are essential. In hydraulic and pneumatic systems, these smooth-surface pipes are widely used for hydraulic oil tubes, cylinder barrels, and piston rods, ensuring reliable sealing performance and stable pressure maintenance.
The automotive industry extensively utilizes our cold-drawn seamless pipes for engine oil passages, transmission shafts, and chassis structural members, benefiting from their optimal strength-to-weight ratio and superior fatigue resistance. For engineering machinery applications, these high-strength tubes serve as hydraulic pipelines and cylinder components in excavators and cranes, withstanding extreme pressure conditions and severe wear environments.
Technical Advantages:
◆Superior dimensional accuracy with tight tolerance control
◆Excellent surface finish reducing friction and improving efficiency
◆Enhanced mechanical properties compared to hot-rolled alternatives
◆Material saving design with optimized wall thickness
◆Superior strength and toughness for high-pressure applications
Our cold-drawn seamless pipes are particularly suitable for medium-low pressure boiler tubes and high-pressure boiler pipes where reliable performance under thermal stress and pressure cycling is required. The cold-drawing technology also enables production of small-diameter thin-walled tubes and special cross-section profiles that cannot be efficiently manufactured through hot-rolling processes.
Backed by Tenjan’s comprehensive manufacturing capabilities and strict quality control system, we provide custom cold-drawn solutions with precise dimensional specifications and superior surface quality, meeting international standards including ASTM, EN, and ISO specifications. Our technical support team offers professional application guidance and engineering solutions to ensure optimal performance in your specific operational requirements.
Custom Sizes OD10-108mm-ASTM/EN/DIN/JIS/GOST Certified -Small-Batch Friendly
| Parameter | Key Features |
| Outer Diameter | 10-108mm (0.39″-4.25″) • Fully customizable |
| Wall Thickness | 1-20mm (0.039″-0.79″) • ±0.1mm precision tolerance |
| Material | Carbon Steel • Alloy Steel • Special grades available |
| Process | Cold Drawn Cold Rolled for superior finish |
| Standard | Typical Grades We Supply |
|
GB |
DT4,Y15,10#,20#,20G,Q235,25Mn,35#,45#,55# 16Mn,Q345B(Q355B),Q345C(Q355C),Q345D(Q355D),Q345E(Q355E),Q420,Q460,20Cr,40Cr, 15CrMo,20CrMo,30CrMo,35CrMo,42CrMo,20CrNiMo,40CrNiMo,20CrMnTi,20Mn2,40Mn2,40MnB,35MnB, 35Mn15CrMn,20CrMn,20CrMnMo,38CrMoAL,36Mn2V,38Mn2V,40MnMoV,15Mo3,16Mo3,31CrMoV9 |
|
ASTM |
1215,1008,1010,1020,A105,A106 Gr.B,A36,1026,1035,1045,1055,SA179,SA192 Gr·50,Gr·55,Gr·65,5120,5140,4130,4135,4140,8620,4340,SAE 5120,1524,1340,15B41,SAE5115,SAE 5120,SCM23 |
| EN | DC01,11SMn30,P235TR1,P195GH,P265TR2,E235 E355,ST52,S355JR,S355JO,S355J2,S355NL,S420N,S420NL,S460NL,20Cr4, 41Cr4,13CrMo4-5,20CrMo4,25CrMo4,34CrMo4,42CrMo4,20NiCrMo2,34CrNiMo6,20MnCr5, 22Mn6,42Mn6,42MnB4,34MnB5,37Mn5,16MnCr5,20CrMo5. |
| JIS | SUM22,S10C,STKM11A,STPT370,STB35,S20C,STKM12,STKM13,STPT410,STB42,SS400,S35C,S45C,S55C SCr22,SCr440,SCM415,SCM420,SCM430,SCM435,SCM440, SNCM220,SNCM439,SMnC420H,SMn420,SMn438, SMnC420H |
| DIN | DC01,11SMn30,CK10,C10,ST35.8,C20,CK20,ST45.8,St37,S235JR,C26D,CK35,CK45,CK55 |
| GOST |
08КП,10,20,Ст3сп,25,35,45,5515Г2, 09Г2C/10Г2C1,15Г2,14Г2С,C355,20Х,40X,15XM,20ХМ,30ХМ,35ХМ,38ХМ,20ХНМ,40ХНМ,20ХГТ,20Г2,40Г2,18ХГ,20ХГМ |
| Other Speical Grades can be customized | |
| Industry | Key Applications Parts | Relevant Standards | Our Advantages |
| General Structural | Square Rectangular Tubes | GB/T 3094,ASTM A500, EN 10210 |
Good Surface,lightweight,precision dimensions (±0.1mm) |
| Automotive and Motorcycle Component | Shock Absorbers，Steering Systems，Thrust Rods | EN 10305-1,JIS G3445, DIN 2391,ASTM A519 |
High fatigue strength,High yield strength,lightweight, precision dimensions (±0.1mm) |
| Engineering and Mining Support | Anchor Bolts,Support Pipes,Hydraulic Props | ASTM A519,DIN 2391, JIS G3441,EN 10297-1, ISO 10799 |
High Strength Yield Strength High Elongation Customization Service – Special steel grades, dimensions and surface treatments available according to project requirements |
| Construction Machinery | Drive shaft sleeves,Gearbox Guide Tubes,Crane Boom Guide Tubes,Excavator Arm Tubes,Loader Frame Tubes,Arctic Low-Temperature Tubes | ASTM A519,DIN 2391, JIS G3445,EN 10210-1, GOST 8733, ASTM A106,ISO 9329 |
ID/OD tolerances of ±0.05mm. Wall thickness uniformity straightness ≤0.5mm/m |
| Fluid Transport Systems | Oil/Gas pipelines,chemical systems,Power/Energy | ASTM A106 Gr.B, EN 10216-2,GOST 8734 |
Eddy Current + Ultrasonic Testing,Hydrostatic Testing |
| High-Pressure Boilers | Superheaters,Steam lines,Reheaters,Economizers) | ASTM A192,DIN 17175, EN 10216, JIS G3461/G3462 |
Enhanced material density through cold-drawing/rolling ensures long-term stability Full Compliance with Int’l Standards,Superior Creep Fatigue Resistance |
| Geological Drilling | Drill Pipe,Tubing | ASTM A519,API 5DP, EN 10208-2 |
High Strength Wear Resistance precision Dimensions Impact Fatigue Resistance |
| Agricultural Machinery | Hydraulic cylinders,drive shafts,Lift arms,steering housings,Boom frames | ASTM A519,EN 10210-1, DIN 2391,GOST 8733, JIS G3445 |
Material Advantages:High Strength Lightweight,Precision Cold-Drawing Technology,Dimensional accuracy ±0.05mm |
| Petroleum Cracking Units | Reformer Tubes,Heat Exchanger Tubes,Reactor Feed Pipes,Transfer Lines,Quench Oil Pipes | ASTM A335,ASTM A213, EN 10216-2 |
Optimized Material Purity,Precision Dimensional Control,Customized Solutions |
Tailored Features · Designed Exclusively for Your Needs
Precision-Engineered Alloy Steel Solutions-20% Cost Efficiency Certified Mill Partnerships:
Collaborating with Baosteel, Xingcheng, and Shagang to deliver:
✔ 100+ Custom Alloy Grades– Chemistry control (C, Cr, Ni, Mo adjustments)
✔ Engineered Mechanical Properties -Yield/Tensile strength customization
✔ Industrial-Grade QC-Full-spectrum testing (UT, hardness, dimensional)
✔ Verified 20% Cost Savings-Through optimized supply chain
Application:Oil & Gas, Automotive, Heavy Machinery, Energy
Extra-Long Piercing + Automated Normalizing Furnace – Precision Alloy Steel Tubes for High-Stress Applications Breakthrough Heating Technology:
Our extra-long piercing furnace ensures uniform heating, of alloy steel billets, eliminating defects like cracks, scaling, and eccentricity for superior tube integrity.p; for precision tubing.
Automated Normalizing Excellence:
✔ ±2°C Precision Control–Industry-leading temperature stability
✔ Enhanced Mechanical Properties–Optimized strength & fatigue resistance
✔ 100% Batch Consistency–Reliable performance for critical applications
Key Industries Served:Oil & Gas, Power Generation, Automotive, Geological Drilling, Mining Support and Construction
Ultra-Precision Tube Straightening – ≤0.5mm/m Tolerance for 30% Faster Machining Industry-Leading Straightening Technology:
Our proprietary system delivers ≤0.5mm/m straightness (4X tighter than standard), enabling:
✔ 30% Faster Machining–Minimizes lathe adjustment time
✔ Extended Tool Life –Reduces cutting tool wear by 20%
✔ Lower Production Costs –Less scrap & downtime
Technical Superiority:
Expert Operation – 20+ years master technicians
Automated QC – Real-time straightness monitoring
Custom Solutions– Optimized for alloy steel grades
Key Applications: Hydraulic Cylinders,Oil & Gas, High-Performance Automotive (drive shafts, suspension components)
Ultrasonic + Eddy Current Dual Testing – High-Reliability Inspection for Alloy Steel Tubes
Advanced NDT System Features:
✔ Ultrasonic Testing (UT)– Detects internal flaws down to 0.20mm
✔ Eddy Current (ET)– Identifies surface/subsurface defects
✔ Multi-Probe Technology– Complete ID/OD/wall coverage
Quality Assurance:
99.7% Detection Rate(Industry-proven reliability)
Dimensional Control– ±0.05mm OD tolerance
Material Verification– Full composition check
Certified Applications: Oil Gas, Energy, Automotive
Annealing represents a crucial delivery condition for precision steel tubes, commercially designated as GBK（+A） condition. Annealed Steel Tubes in GBK condition constitute a specialized category of precision steel pipes that have undergone complete annealing treatment after cold forming processes. These stress-relieved seamless tubes are manufactured accordi
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Cold Finished and Stress-Relieved Steel Pipes (BKS/+SR Condition) represent a precision delivery state where steel tubes undergo specialized stress relief annealing after cold forming processes. These stress-relieved seamless tubes effectively eliminate residual internal stresses from cold working while preserving the high dimensional accuracy and partial st
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Cold Finished (hard) Steel Pipes (BK/+C) represent a delivery state where steel tubes undergo cold forming processes without subsequent heat treatment. These hard-condition seamless tubes maintain their as-cold-worked properties, featuring high strength and precise dimensional characteristics that make them suitable for applications requiring rigid component
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Cold Finished(Soft) Steel Pipes (BKW/+LC n) represent a specialized delivery state where steel tubes undergo cold forming followed by low-temperature stress relief annealing. These soft-condition seamless tubes balance the high precision of cold working with the improved plasticity from stress relief treatment, positioning them between hard condition (BK) an
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