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Seamless Steel Tubes

Seamless Alloy Steel Tubes

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Precision Seamless Alloy Steel Tubes for Industrial Applications

Custom Sizes OD10-108mm-ASTM/EN/DIN/JIS/GOST Certified-Small-Batch Friendly

Product Specifications
ParameterKey Features
Outer Diameter10-108mm (0.39"-4.25") • Fully customizable
Wall Thickness1-20mm (0.039"-0.79") • ±0.1mm precision tolerance
MaterialsCarbon Steel • Alloy Steel • Special grades available
ProcessCold Drawn & Cold Rolled for superior finish
Seamless Alloy Steel Tubes&Pipe -Steel Grade Availability
StandardTypical Grades We Supply
GB16Mn,Q345B(Q355B),Q345C(Q355C),Q345D(Q355D),Q345E(Q355E),Q420,Q460,20Cr,40Cr,
15CrMo,20CrMo,30CrMo,35CrMo, 42CrMo,20CrNiMo,40CrNiMo,20CrMnTi,20Mn2,40Mn2,40MnB,35MnB,
35Mn,15CrMn,20CrMn,20CrMnMo,38CrMoAL,36Mn2V,38Mn2V, 40MnMoV,15Mo3, 16Mo3,31CrMoV9
ASTMGr·50,Gr·55,Gr·65,5120,5140,4130,4135,4140,8620,4340,
SAE 5120,1524,1340,15B41,SAE5115,SAE 5120,SCM23
EN/DINE355,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.
JISSCr22,SCr440,SCM415,SCM420,SCM430,
SCM435,SCM440,SNCM220,SNCM439,SMnC420H,SMn420,SMn438,SMnC420H
GOST15Г2, 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-Specific Solutions
IndustryKey Applications PartsRelevant StandardsOur Advantages
Automotive and Motorcycle ComponentShock Absorbers,Steering Systems,Thrust RodsEN 10305-1,JIS G3445,
DIN 2391,ASTM A519
High fatigue strength,High yield strength, lightweight, precision dimensions (±0.1mm)
Engineering and Mining SupportAnchor Bolts,Support Pipes,Hydraulic PropsASTM 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 MachineryDrive shaft sleeves,Gearbox Guide Tubes,Crane Boom Guide Tubes,Excavator Arm Tubes,Loader Frame Tubes,Arctic Low-Temperature TubesASTM 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 SystemsOil/Gas pipelines,chemical systems,Power/EnergyASTM A106 Gr.B,
EN 10216-2,GOST 8734
Eddy Current + Ultrasonic Testing,Hydrostatic Testing
High-Pressure BoilersSuperheaters,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 DrillingDrill Pipe,TubingASTM A519,API 5DP,
EN 10208-2
High Strength & Wear Resistance precision Dimensions Impact & Fatigue Resistance
Agricultural MachineryHydraulic cylinders,drive shafts,Lift arms, steering housings,Boom framesASTM 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 UnitsReformer Tubes,Heat Exchanger Tubes,Reactor Feed Pipes,Transfer Lines,Quench Oil PipesASTM A335,ASTM A213,
EN 10216-2
Optimized Material Purity,Precision Dimensional Control,Customized Solutions

Why Global Customers Trust Tenjan Steel Tubes?

Vertical Integration Excellence in Steel Tube Manufacturing
Vertical Integration Excellence in Steel Tube Manufacturing Vertical Integration Excellence in Steel Tube Manufacturing

Vertical Integration Excellence in Steel Tube Manufacturing

One-Stop Precision Tube Production from Raw Material to Finished Product

Material Customization: Alloy Steel & Carbon Steel design & Certified billet sourcing

Integrated Production:Seamless piercing, cold drawing/rolling, heat treatment,Integrated ECT/UT Inspection

Full Process Traceability: Batch-tracked at every production stage
Certified Steel Tubes for Demanding Applications
Certified Steel Tubes for Demanding Applications Certified Steel Tubes for Demanding Applications

Certified Steel Tubes for Demanding Applications

Trusted Quality Backed by Global Standards

Quality Certifications:IATF 16949,ISO 9001,Third-party verified by SGS & TÜV

Material Compliance:ASTM (A519, A106, A179, A192) ,EN/DIN (10297, 2391,1629,10305) ,JIS (G3445/G3444)
Precision-Engineered Steel Tubes • Customized for Your Critical Applications
Precision-Engineered Steel Tubes • Customized for Your Critical Applications Precision-Engineered Steel Tubes • Customized for Your Critical Applications

Precision-Engineered Steel Tubes • Customized for Your Critical Applications

Customized Material Specification | Dimensional Precision | Profile Customization | Performance Enhancement | Flexible Volume Production

> Carbon & alloy steel grades,Custom chemical composition,Full MTC traceability
> OD: 10–108mm (0.39"–4.25") WT: 1–20mm (0.04"–0.79")
> Seamless round tubes,Cold-formed shapes((square, rect., hex. & others)
> Annealed/Normalized,Quenched & Tempered,Surface finishes:Pickled/Oiled
> Small batch: 5 tons MOQ
Total Steel Tube Solutions for Industry
Total Steel Tube Solutions for Industry Total Steel Tube Solutions for Industry

Total Steel Tube Solutions for Industry

Precision Tubes Engineered for: Auto Parts | Mechanical Parts | Agricultural Machinery | Mining Support & Construction | High-Pressure Systems

Technical Support Services: Design Consultation | Material Selection | Testing Validation

Value-Added Processing: Precision Cutting, Chamfering,OD/ID machining, Anti-rust oil, Custom Packaging
Learn More

Why Global Customers Trust Tenjan Steel Tubes?

Customizable Alloy and Carbon Steel Grades

Customizable Alloy and Carbon Steel Grades

We offer customizable alloy and carbon steel gra- des to match your project’s exact requirements.

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.

Customizable Alloy and Carbon Steel Grades

Reliable Delivery Capacity

With an annual production capacity of 60,000 tons, we guarantee on-time delivery even for large-scale orders.

Our surplus capacity acts as a safety net, eliminating risks of bottlenecks or missed deadlines—critical for projects with strict timelines.

Customizable Alloy and Carbon Steel Grades

Complete Manufacturing Supply Chain

We offer customizable alloy and carbon steel grades (ASTM, EN, DIN, JIS) to ma- tch your project’s exact requirements.

• 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

Customizable Alloy and Carbon Steel Grades

Meet Regulatory Standards Compliance

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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