Pipes & Tubes Material

Seamless Carbon Steel Tubes

Custom seamless carbon steel tubes from Tenjan in ASTM, EN, DIN, JIS and GB grades, with precision dimensions, testing and global project support. Confirm the material standard and acceptance requirements before ordering.

Custom grades & dimensionsFull quality traceabilityGlobal standards support

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Product details

Product Description

Precision Seamless Carbon Tubes for Industrial Applications

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

Technical data

Product Specifications

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

Available materials

Shaped Seamless Steel Tube&Pipe - Steel Grade Availability

Industry	Typical Grades We Supply
GB	DT4,Y15,10#,20#,20G,Q235,25Mn,35#,45#,55#
ASTM	1215,1008,1010,1020,A105,A106 Gr.B,A36,1026,1035,1045,1055,SA179,SA192
EN	DC01,11SMn30,P235TR1,P195GH,P265TR2,E235
DIN	DC01,11SMn30,CK10,C10,ST35.8,C20,CK20, ST45.8,St37,S235JR,C26D,CK35,CK45,CK55
JIS	SUM22,S10C,STKM11A,STPT370,STB35,S20C,STKM12, STKM13,STPT410,STB42,SS400,S35C,S45C,S55C
GOST	08КП,10,20,Ст3сп,25,35,45,55
Other Speical Grades can be customized

Applications

Industry-Specific Solutions

Standard	Key Applications Parts	Relevant Standards	Our Advantages
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

Why choose us

Custom Advantages

Tailored Features · Designed Exclusively for Your Needs

Hollow Steel Tubes for Machined Components – Review the Material Allowance Component Selection Considerations:

When comparing soft iron carbon tubes and 1215 free-cutting steel tubes with solid bar stock, review the machining allowance and required inspection.

Key Benefits:

✔ Compare Total Processing Cost– Compare hollow tubes with solid bar stock

✔ Machining Planning – Review boring, cutting and assembly requirements

✔ Material Allowance – Compare tube dimensions with the finished-part drawing

Applications: Automotive, Hydraulics, Fasteners, and Machined Components.

Cold Drawing + Cold Rolling Dual-Process Technology – Affordable Small-Diameter Seamless Steel TubesInnovative Production for Precision Tubes:

Our self-developed piercing mill combines cold drawing & cold rolling, optimizing efficiency for small-diameter seamless steel tubes (OD<50mm).

Key Advantages:

✔ Cost Review – Compare material allowance and processing requirements

✔ Tolerance Review– Confirm dimensional and surface acceptance criteria

✔ Delivery Planning– Agree lead time for the specified profile and quantity

Applications: Automotive, Hydraulics, Oil & Gas/Petrochemical, High-Pressure Boilers and Fluid Transport Systems.

Carbon Steel Grade Selection for Machining and Structural Components Premium Steel Supply Chain:

Review material sourcing with Baosteel, Xingcheng and Shagang. Confirm availability for the listed 100+ carbon steel grades, and agree the grade, delivery condition and acceptance requirements for each order.

Customization Advantages:

✔ Chemical Composition– Adjust C, Mn, Si, etc. for specific applications

✔ Mechanical Properties– Yield/Tensile strength optimization

✔ Rigorous QC– Full inspection (UT, hardness testing, dimensional checks)

✔ Project-Specific Procurement Review– Consider order quantity and downstream processing costs

Key Industries Served: Machining, Automotive, Construction and Infrastructure, Oil & Gas, Heavy Equipment

Tube Straightening and Machining Preparation – Confirm the Required StraightnessStraightness and Machining Review:

Confirm the required carbon steel tube straightness, including the stated ≤0.5mm/m value, against the order specification before machining or assembly.

Key Advantages:

✔ Plan the Machining Allowance– Confirm straightness before lathe processing

✔ Cutting Tool Selection– Match tooling and cutting conditions to the supplied grade and hardness

✔ Production Planning– Review machining allowance, handling and scrap criteria

Production and Inspection Review:

In-House Developed Equipment– Customized for machining-grade precision

Production Experience Review– Confirm the relevant experience and production control plan

Automated Quality Control– Consistent straightness verification

Applications to Review: Hydraulic Cylinder Tubes, Automotive Shafts, Industrial Machinery, Oil & Gas Equipment

Ultrasonic + Eddy Current Dual-Testing – 0.20mm Flaw Detection for Critical Steel Tubes Inspection Method and Acceptance Criteria:

Our dual-technology inspection system delivers 0.20mm flaw detection accuracy; confirm the reference standard and acceptance criteria for the application.

Dual-Testing Advantages:

✔ Ultrasonic Testing (UT)– Detects 0.20mm micro-cracks & inclusions

✔ Eddy Current (ET)– Pinpoints surface/subsurface defects

✔ Multi-Probe Array– 360° coverage (ID/OD/wall thickness)

Two-Layer Quality Assurance

Flaw Detection: Cracks/pores/inclusions ≤0.20mm

Dimensional Control: ±0.05mm tolerance verification

Critical Applications: Automotive Airbag Tubes, Fluid Transport Systems, Petrochemical High-Pressure Piping