Steering-system tubing
E355 cold-drawn welded tubes for automotive steering systems.
30 × 2.2 × 385 mm
25 × 2 × 133 mm
25 × 2 × 133 mm
JIANGSU DOM CORPORATION LIMITED
Precision steel tubes.
For gas springs & automotive parts.
Carbon steel welded and cold-drawn tubes for gas-lift components, shock absorbers and steering systems. Cutting, chamfering and machining in one manufacturing route.
Start with an application or one regular size. A drawing is optional.
2007Established in Changzhou
75,000 m²Approx. site area
45,000 m²Approx. building area
JIANGSU DOMMeet the manufacturer ↗GAS-LIFT & GAS-SPRING TUBING
A practical starting point for your tube component.
Cold-drawn welded carbon steel tubes, with regular SAE1008 and SPHT3 production sizes and finishing to your part requirement.
SAE1008 · SPHT3
Explore 9 regular tube sizes
View the actual material and size combinations, processing options and supporting documents.
View materials & sizes ↗TUBE BLANKS & PROCESSED TUBE PARTS
Start with the part you make.
- Materials: SAE1008 and SPHT3
- Typical examples: 18 × 1 mm · 22 × 1.5 mm · 28.05 × 2 mm
- Processing: cut to length, chamfering and specified machining
Tell us whether you need tube stock or processed tube parts.
Enquire about gas-spring tubesEXPORT SUPPLY EXPERIENCE
Supplied for real automotive applications.
Selected examples from DOM export supply records.
Shock absorber tubing
Carbon steel welded tubes for automotive shock absorber applications.
36.948 × 1.01 mm
48.6 × 1.8 mm
48.6 × 1.8 mm
Long-length tube supply
S550MC welded tubes and 20G seamless steel tubes.
42.7 × 4.8 × 8000 mm
21.7 × 2.8 × 7000 mm
21.7 × 2.8 × 7000 mm
Dimensions: OD × wall thickness, with length where shown. Representative examples, not the complete product range.
Choose the construction for your component.
Welded, cold-drawn welded and cold-drawn seamless tubes remain distinct product routes.
01FORMED · WELDED · SIZED
Precision welded tubes
High-frequency welded steel tubes for mechanical components.
Thick-wall HF rangeOD 17.3–42.7 mmWall 1.2–8.0 mm
View product & specifications 02WELDED · COLD DRAWN
Cold-drawn welded tubes
Welded mother tubes, cold drawn for dimensional and surface requirements.
Cold-drawn welded rangeOD 12–78 mmWall 0.8–8.0 mm
View product & specifications 
03SEAMLESS · COLD DRAWN
Cold-drawn seamless tubes
Cold-drawn seamless steel tubes for specified mechanical applications.
Seamless constructionDrawing-based selectionShare your required dimensions
View product & specifications From tube production to finished tube parts.
Welding, cold drawing and specified machining at our Changzhou facilities.
Material, dimensional and final inspection.
Review inspection capabilities, the quality-management certificate and original documents.
01Raw material inspection
Chemical analysis, mechanical testing and material traceability.
Explore inspection ↗
02In-process inspection
Diameter, roundness, surface finish and tube-integrity checks.
Explore inspection ↗
03Final inspection
Dimensions, length, runout, appearance and specified finishing.
Explore inspection ↗Material identification. Dimensional checks. Tube integrity.
Inspection capabilities & IATF certificate ↗IATF 16949:2016
Certificates, patents & company qualifications ↗NQA · Certificate T8345 · Valid until 22 January 2027
12 PAGES · PDF ↓YOUR PRODUCT REFERENCE
Specifications, applications
and manufacturing in one catalogue.
Our precision steel tube range, production capabilities and application examples — in one product catalogue.
- Welded, cold-drawn welded & seamless tubes
- Size matrices, materials & delivery conditions
- Applications, processing & quality inspection
PDF · 12 pages · Direct download
Have a tube size in mind? Send us your enquiry ↗What should I send for an initial enquiry?
A regular size, intended application and approximate quantity are a useful starting point. Include a drawing when dimensions, tolerances or machining features need to be defined.
Can I enquire about cut or machined tube parts?
Yes. DOM’s processing capabilities include cutting, chamfering, Swiss-type machining, cleaning and inspection. Share the part drawing and required finishing operations.
Where can I review quality documents?
The Quality System page presents inspection capabilities and the IATF certificate. Certifications contains recognition plaques, patents and dated historical documents.
View quality system ↗LET’S START WITH ONE SPECIFICATION
Have a drawing or a regular tube size?
Send your application and quantity. We can review the tube and processing requirements with you.