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Steel Tubing Solutions

High-strength, corrosion-resistant steel and titanium tubes engineered for automotive, oil & gas, industrial, and aerospace applications. Trusted by global partners since 1992.

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About Jiangsu Hongbao Group

A leading Chinese manufacturer of precision steel and titanium tubing with over 30 years of experience in metallurgy and advanced tube production.

Jiangsu Hongbao Group Co., Ltd. specializes in the research, development, and manufacturing of high-performance welded steel tubes, precision seamless tubes, and specialty titanium alloy tubing for demanding industrial environments.

Our products are widely used in automotive systems, oil drilling, heat exchangers, hydraulic machinery, and aerospace applications due to their superior mechanical performance, dimensional accuracy, and corrosion resistance.

46+
Titanium Tube Models
30+
Export Countries
Welded Steel Tube Bearing Steel Tube Bundy Tube Seamless Tube Testing

Our Premium Product Range

Engineered for performance, durability, and precision across industries

DIN2391 E235 WT15 Seamless Steel Tube

DIN2391 E235 WT15 Seamless Steel Tube

Black phosphated, high mechanical performance, ideal for hydraulic systems.

  • Standard: DIN2391
  • Material: E235
  • Finish: Black Phosphated
  • Application: Hydraulic & Pneumatic Systems
Bearing Steel Tube

GCr15 Cold Drawn Bearing Steel Tube

High-precision seamless tube for rolling element bearings and transmission systems.

  • Material: GCr15
  • Process: Cold Drawing
  • Tolerance: ±0.05mm
  • Application: Bearings, Gearboxes
Steel Bundy Tube

Low Carbon Steel Bundy Tube

Corrosion-resistant, thin-walled tubing for refrigeration and automotive AC lines.

  • Diameter: 4.76mm
  • Wall: 0.5mm
  • Material: Low Carbon Steel
  • Application: Refrigeration, HVAC
Titanium Alloy Rod

Gr5 ASTM F67 Titanium Alloy Rod

High-strength, lightweight titanium bar with polished surface for aerospace use.

  • Grade: Gr5 (Ti-6Al-4V)
  • Standard: ASTM F67
  • Finish: Polished
  • Application: Aerospace, Medical
Seamless Titanium Tube

Gr9/Gr12 Precision Seamless Titanium Tube

Lightweight heat exchanger tube with excellent corrosion resistance.

  • Grade: Gr9, Gr12
  • Diameter: 6–219mm
  • Test: Eddy Current, Hydrostatic
  • Application: Chemical, Heat Exchangers
Titanium Alloy Bar

Titanium Alloy Metal Bar – Polished Surface

ASTM F67 compliant titanium bar for high-reliability engineering components.

  • Material: Ti-6Al-4V (Gr5)
  • Surface: Polished
  • Standards: ASTM F67, ASME SB-265
  • Application: Defense, Aviation
Automotive Steel Tubing

EN10305 34MnB5 Automotive Steel Tubing

Thin-wall welded steel tubing for hollow stabilizer bars and chassis components.

  • Standard: EN10305
  • Material: 34MnB5
  • Process: Welded, Cold Drawn
  • Application: Automotive Suspension
Cold Drawn Seamless Tube

Cold Drawn Seamless Precision Steel Tube

High dimensional accuracy, smooth surface finish for hydraulic and fuel systems.

  • Grade: E355
  • Process: Cold Drawn
  • Tolerance: ±0.03mm
  • Application: Hydraulic Cylinders, Fuel Lines
View All 200+ Products

Why Choose Our Steel & Titanium Tubes?

Engineered excellence backed by decades of metallurgical expertise

Industrial-Grade Quality

ISO-certified manufacturing with strict quality control and full traceability.

Corrosion Resistant

Galvanized, phosphated, and annealed finishes for long-term durability.

Precision Engineering

Tight tolerances down to ±0.03mm for seamless integration.

High Strength

Cold drawing and seamless processes ensure superior mechanical properties.

30+
Years in Industry
200+
Product Models
50,000+
Tons Annual Output
30+
Export Countries

Frequently Asked Questions

Get answers to common inquiries about our products and services

What standards do your steel tubes comply with?

Our products meet international standards including DIN2391, EN10305, ASTM A519, GB/T 9808, and ISO 3304/3305 for precision and welded tubes.

Can you customize tube dimensions and finishes?

Yes, we offer custom lengths, diameters, wall thicknesses, and surface treatments such as galvanizing, pickling, annealing, and phosphating.

What industries do you serve?

We supply to automotive, oil & gas, aerospace, HVAC, machinery, and chemical processing industries worldwide.

Do you provide material test certificates?

Yes, all shipments include MTCs (Material Test Certificates) compliant with EN 10204 3.1 or 3.2 as required.

Get in Touch

Reach out for quotes, technical specifications, or partnership opportunities.

Contact Information

Email: export@hongbao.com

Phone: 86-512-58715276

Mobile: 8615895686919

Representative

Name: Ms. Angela

Fax: 86-512-58715258

Company: Jiangsu Hongbao Group Co., Ltd.

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