Standard Steel Pipes & Tube

JIS G3441 Steel Pipe

JIS G3441 seamless steel pipes are suitable for machine structures and mechanical parts requiring reliable strength and dimensional stability. Confirm the material standard and acceptance requirements before ordering.

Custom grades & dimensionsFull quality traceabilityGlobal standards support

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Product details

Product Description

Technical Excellence & Customization

While JIS G3441 covers a range of alloy steel grades (including SCr, SCM, and SNCM series), Tenjan’s expertise lies in tailoring materials to meet specific operational needs. Our custom alloy formulation capabilities allow us to produce tubes with optimized chemical compositions, ensuring enhanced mechanical properties such as higher tensile strength, improved wear resistance, and superior fatigue performance. Whether you require chromium-molybdenum steels for high-temperature applications or nickel-chromium alloys for impact-resistant components, we provide tailored solutions that align with JIS G3441’s stringent requirements.

Key Advantages of Tenjan’s Manufacturing Process

Precision Cold-Drawing /cold rolling Technology:

•Achieves tight dimensional tolerances (e.g., outer diameter ±0.1 mm, wall thickness ±10%) and exceptional surface smoothness (Ra ≤ 3.2 μm).

•Enhances grain structure uniformity and mechanical strength through controlled strain hardening.

Superior Material Performance:

•High yield strength (≥355 MPa) and tensile strength (≥450–980 MPa, depending on grade) for load-bearing components.

•Excellent toughness and fatigue resistance, ideal for dynamic or high-stress applications.

Flexible Heat Treatment Options:

•Tubes supplied in normalized, annealed, or quenched-and-tempered states to meet specific hardness and ductility requirements.

Quality Assurance & Compliance

Every batch of Tenjan’s JIS G3441 tubes undergoes rigorous testing to ensure compliance with international standards:

•Chemical Analysis: Verification of alloy elements (Cr, Mo, Ni, etc.) and impurity control (P, S ≤ 0.030%).

•Mechanical Testing: Tensile, hardness, and impact tests to validate performance under simulated operational conditions.

•Non-Destructive Inspection: Ultrasonic or eddy current testing to detect internal or surface defects.

•Certification: Mill test certificates (ISO 9001-compliant) providing full traceability from raw material to finished product.

Applications & Industry Solutions

Tenjan’s JIS G3441 tubes are trusted in critical mechanical applications worldwide:

•Automotive Systems: Driveshafts, suspension components, and engine parts requiring high strength-to-weight ratios.

•Industrial Machinery: Hydraulic cylinder barrels, precision shafts, and robotic arm components.

•Energy Equipment: High-pressure piping and structural supports for machinery.

Why Choose Tenjan?

•Customization Expertise: Ability to produce tubes in proprietary alloy grades or dimensions beyond standard offerings.

•Technical Collaboration: End-to-end support from material selection to application engineering.

•Global Standard Alignment: Tubes adhere to JIS G3441 while maintaining compatibility with ASTM A519, EN 10297-1, and GB/T 3089.

By combining Japan’s exacting standards with Tenjan’s manufacturing prowess, we deliver alloy steel tubes that redefine reliability and precision for the most challenging mechanical applications. Let us collaborate to create a tailored solution for your needs.

Precision Seamless Alloy Steel 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
Materials	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

Standard	Typical Grades We Supply
GB	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, 35Mn,15CrMn,20CrMn,20CrMnMo,38CrMoAL,36Mn2V,38Mn2V, 40MnMoV,15Mo3, 16Mo3,31CrMoV9
ASTM	Gr·50,Gr·55,Gr·65,5120,5140,4130,4135,4140,8620,4340, SAE 5120,1524,1340,15B41,SAE5115,SAE 5120,SCM23
EN/DIN	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	SCr22,SCr440,SCM415,SCM420,SCM430, SCM435,SCM440,SNCM220,SNCM439,SMnC420H,SMn420,SMn438,SMnC420H
GOST	15Г2, 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

Applications

Industry-Specific Solutions

Industry	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

Alloy Steel Material and Process Planning Material Sourcing Review:

For each order, confirm the material grade, dimensions and acceptance requirements:

✔ 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)

✔ Project-Specific Cost Review-Compare grade, order quantity and downstream processing requirements

Application:Oil & Gas, Automotive, Heavy Machinery, Energy

Extra-Long Piercing + Automated Normalizing Furnace – Precision Alloy Steel Tubes for High-Stress Applications Heating and Delivery Condition Review:

Review billet heating and normalizing requirements for alloy steel tubes, and agree the delivery condition and acceptance criteria before production.

Normalizing Requirements to Confirm:

✔ ±2°C Precision Control–Confirm the temperature-control requirement

✔ Mechanical Property Review–Specify strength and fatigue-related acceptance requirements

✔ Batch Consistency Checks–Confirm heat and batch traceability

Key Industries Served:Oil & Gas, Power Generation, Automotive, Geological Drilling, Mining Support and Construction

Tube Straightening – Confirm Requirements Before Machining Straightness and Machining Review:

Confirm the required straightness, including the stated ≤0.5mm/m value, against the component drawing and agreed inspection method:

✔ Machining Preparation– Confirm straightness and machining allowance for the component

✔ Cutting Tool Selection – Select cutting conditions for the supplied grade and hardness

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

Production and Inspection Review:

Process Review – Confirm the production route and inspection records

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– Confirm ID/OD/wall coverage

Quality Assurance:

Inspection Acceptance Criteria(agree the method, reference standard and acceptance level)

Dimensional Control– ±0.05mm OD tolerance

Material Verification– Full composition check

Application Review: Oil & Gas, Energy, Automotive