DIN, En, ASTM Material Alloy Steel Seamless Special Shaped Precision Tubes

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Product Description

Basic Information
Model NO.
smls
Technique
Cold Drawn
Material
Carbon Steel
Surface Treatment
Polished
Section Shape
Special Section
Outer Diameter
10-120mm (0.4 - 4.7 Inch)
Wall Thickness
1-20mm (0.04 - 0.78 Inch)
Tolerance
±0.15mm
Origin
China
HS Code
7304319000
Product Description & Specifications
Seamless Steel Tube Key Features
  • Precise custom outer diameter and inner diameter
  • Tight tolerances, resulting in reduced machine time / Dimensional accuracy
  • Smooth and Clean OD and ID surfaces
  • Excellent machining characteristics
  • Wider range of physical properties attainable through process and annealing options
Category Specifications / Details
Production Range Outer Diameter: 10-120mm; Wall Thickness: 1-20mm
Carbon Steel Grades GB/T 8162 & 8163 & 3639 (10#, 20#, Q235B, etc.); ASTM A519 (1010, 1020, 1045, etc.); DIN/EN Series (C10, C22, STKM11A, etc.)
Alloy Steel Grades 16Mn(Q345B), 40Cr, 15CrMo, 42CrMo, 20CrMnTi; ASTM A519 (4130, 4140); DIN EN10084 (20Cr4, 16MnCr5)
Tolerance Standard ±0.15mm; Superior products ±0.05mm
Processing Annealing, Cutting, Chamfer, Threading, Lathe Work, Shot Blasting, Laser Marking
Production Process
1. Raw Material Storage & Cutting
Material Cutting
2. Hot Perforation & Squeeze Head
3. Cycling Pickling & Drawing
4. Annealing & Straightening
5. Quality Inspection & Testing
Eddy Current Inspection
Our Manufacturing Strength

With an annual production capacity reaching 60,000 tons, we are a leading technical manufacturer in the seamless steel tube industry. We specialize in high-quality seamless steel tubes meeting international standards such as ASTM A519, DIN2391, and EN10305-1. We provide small batch customization services for enterprises globally.

Certification
⚙️R&D Capability

Full production system with advanced equipment for perforation, pickling, cold rolling, and flaw detection.

🛡️Quality Control

ISO9001 and IATF16949 certified. Every batch includes raw material and quality certificates with full traceability.

🌍Global Export

Products are exported to over 20 countries across Europe, America, Japan, and the Middle East.

Manufacturing Facility
Frequently Asked Questions (FAQ)
What is the production range for your seamless steel tubes? We can produce tubes with an outer diameter from 10mm to 120mm and a wall thickness from 1mm to 20mm.
What materials are available for customization? We provide both Carbon Steel (e.g., 10#, 20#, 45#) and Alloy Steel (e.g., 40Cr, 15CrMo, 42CrMo) under various international standards.
What kind of tolerances can you achieve? Our standard tolerance is ±0.15mm, but we can achieve superior accuracy of ±0.05mm for customized requirements.
Do you provide further processing services? Yes, we offer final annealing, precision cutting, chamfering, threading, surface shot blasting, and laser marking.
How is the quality of the steel tubes ensured? We implement a complete quality control system following ISO9001, including chemical composition tests, tensile tests, and eddy current detection.
What are the typical applications for these tubes? They are widely used in pipeline transport, boiler systems, hydraulic/automobile parts, machinery industry, and chemical processing.

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