Welcome to Changzhou Tenjan Steel Tube Co., Ltd
Sunny@tenjan.com
At Tenjan, we specialize in manufacturing EN 10305-1 precision steel tubes that meet the rigorous European standard for cold-drawn seamless tubing. Our precision-engineered tubes are manufactured through advanced cold-drawing processes to deliver exceptional dimensional accuracy, superior surface quality, and consistent mechanical properties. Designed for applications where exact tolerances and reliable performance are critical, Tenjan's EN 10305-1 tubes represent the perfect fusion of European engineering standards and our manufacturing expertise.
Technical Excellence Through Precision Manufacturing
EN 10305-1 establishes the benchmark for cold-drawn seamless tubes in precision applications. At Tenjan, we've mastered the art of transforming this comprehensive European standard into high-performance tubing solutions that exceed customer expectations across various industries.
Tenjan's Manufacturing Advantages
Advanced Cold-Drawing Technology
•Exceptional dimensional accuracy with tight diameter and wall thickness tolerances
•Superior surface finish both internally and externally, minimizing further machining requirements
•Enhanced mechanical properties through controlled cold-working processes
•Consistent material structure and performance characteristics across all production batches
Material Versatility & Quality
•Comprehensive range of steel grades including non-alloy quality steels and alloy structural steels
•Optimized material selection for specific application requirements
•Consistent mechanical properties ensuring reliable performance
•Excellent machinability and forming characteristics for further processing
Quality Assurance & Certification
Tenjan's commitment to quality ensures every EN 10305-1 tube meets the most demanding application requirements: 加粗
•Comprehensive Testing Protocol
•Full chemical composition verification ensuring material conformity
•Complete mechanical properties validation including tensile and yield strength
•Dimensional accuracy certification for all critical parameters
•Surface quality inspection and roughness measurement
Certification & Traceability
•Complete material traceability from raw material to finished tubes
•Detailed test certificates providing comprehensive performance data
•ISO 9001 certified manufacturing processes
•Customized documentation packages supporting project compliance
Applications & Engineering Solutions
EN 10305-1 precision tubes from Tenjan deliver reliable performance across diverse industries:
Automotive Engineering
•Fuel injection system components
•Hydraulic brake lines and power steering systems
•Shock absorber components and suspension parts
•Precision shafts and bearing housings
Industrial Machinery
•Hydraulic and pneumatic cylinder tubes
•Machine tool guides and structural components
•Automation equipment frames and elements
•Precision instrument components
General Engineering
•High-precision mechanical structures
•Material handling system components
•Specialized equipment requiring exact tolerances
•Custom engineering applications
Tenjan's Value Proposition
Our specialized manufacturing approach delivers distinct advantages for precision applications:
Technical Expertise
•Advanced cold-drawing technology ensuring precision dimensions
•Engineering support for optimal material and heat treatment selection
•Technical consultation for complex application requirements
•Customized solutions for specific project needs
Quality Commitment
•Stringent process controls throughout manufacturing
•Continuous quality monitoring and improvement initiatives
•Professional technical assistance for installation guidance
•Reliable performance in demanding service conditions
Customer-Centric Approach
•Flexible manufacturing accommodating specific requirements
•Responsive service supporting project timelines
•Comprehensive technical documentation
•After-sales support ensuring application success
Through our dedicated manufacturing approach, Tenjan delivers EN 10305-1 tubes that combine standard compliance with practical application excellence. Our expertise in cold-drawing processes ensures we can meet your specific precision engineering requirements while maintaining the highest standards of quality and reliability for your most challenging applications.
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
Why settle for generic materials when we can align specifications directly to your application? By focusing on only what you need, we deliver superior cost efficiency without compromising quality—saving you time and resources.
Our surplus capacity acts as a safety net, eliminating risks of bottlenecks or missed deadlines—critical for projects with strict timelines.
• Advanced metalworking: Piercing, pickling, heat treatment & cold forming
• Precision verification: Dual NDT (Ultrasonic/Eddy Current) + material testing (Tensile/Chemical)
• 24/7 lab monitoring of 60+ parameters ensuring product consistency
IATF16949: Automotive-grade quality for precision parts.
TS (Pressure Pipe): Safety compliance for critical infrastructure (e.g., pipelines, boilers).
ISO9001: General excellence in process management.
Plus optional third-party validation (TÜV/SGS) for added credibility in regulated markets like aerospace, energy, or medical devices.
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