Tianjin Brisk Steel is one of the manufacturers of Mild Steel Tube / Low‑carbon steel tube / carbon steel hollow section in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
PRODUCT
Tianjin Brisk Steel focus on produce and supply hollow section and steel pipe
Basic Definition & Core Concept
1. Mild Steel Tube (MS Tube) Also named: Low‑carbon steel tube, carbon steel hollow section. Carbon content range: 0.05%‑0.25%. It is the most popular structural hollow steel product worldwide, featured by good ductility, easy welding, easy bending, low cost and excellent fabrication performance.
2. Term clarification (critical for buyers):
- Tube: Primarily for structural, framing, mechanical purposes (our main product)
- Pipe: Primarily for fluid transport (water, gas, oil pipeline) Many markets use these two words interchangeably, you can confirm usage requirement with clients.
- Common alias you may see from customers: MS hollow tube, CHS / SHS / RHS, structural hollow section, black steel tube.
3. Product Shape Types：
- CHS‑Circular Hollow Section - Round mild steel tube
- SHS‑Square Hollow Section - Square mild steel tube
- RHS‑Rectangular Hollow Section - Rectangular mild steel tube
- Special shape: Oval, elliptical and other custom‑shaped tubes upon request
4. Mainstream manufacturing process:
- Hot-rolled or cold-rolled steel strip → Cold-forming into a square shape → Longitudinal high-frequency welding → Weld seam leveling → Cut-to-length → Straightening
International Standards & Common Grades
| Standard | Grade | Main Target Market |
|---|---|---|
| ASTM A500 | Grade B / C / D | North America, Africa, Middle East |
| EN 10219‑1 | S235JRH, S275J0H, S355J2H | Europe, New Zealand, Jordan, Ireland |
| EN 10210 | S235J2H, S355J2H | Hot finished hollow section |
| ASTM A53 Grade B | ‑ | Water pipeline, scaffolding round tube |
| BS 1387 | Medium / Heavy class | UK, old British‑rule countries |
| AS/NZS 1163 | C250, C350, C450 | Australia & New Zealand |
We can produce Mild Steel Tube fully compliant with your local standard, provide official mill test certificate (MTC) with heat number, chemical & mechanical test data for customs clearance & project acceptance.
Surface Treatment Options (Big decision point for buyers)
- Black Finish (Black tube) - Hot‑rolled black skin: Lowest cost, temporary anti‑rust oil coated; for indoor use or clients doing further painting themselves
- Clear Varnish / Lacquer: Thin transparent protective film against short‑term rust during sea transportation
- Black Varnish / Black Paint: Uniform black surface, better rust protection than bare black tube
- Hot‑Dip Galvanized (HDG): Zinc coating layer, excellent outdoor anti‑corrosion performance; two process options: suspension galvanizing, centrifugal galvanizing
- Powder Coating: Custom color available, high‑quality decorative & anti‑rust surface
- Important reminder: Bare black mild steel tube will rust if exposed to humid outdoor environment long‑term.
Mechanical & Chemical Properties
Chemical composition
- Low carbon, low sulfur & phosphorus. Low carbon guarantees good weldability.
Mechanical performance
- Yield strength: Depends on steel grade (S235 min yield 235MPa; S355 min yield 355MPa etc.)
- Elongation: Good ductility, can be bent, drilled, welded, cut easily
- Weldability: Excellent, no pre‑heating required for normal welding work
Wide Application Fields
- Construction industry: Steel structure frames, building supports, columns, truss
- Scaffolding & formwork: Construction site scaffolding tubes
- Fencing & guardrail: Highway guardrails, garden fences, security barriers
- Furniture industry: Steel table, chair, shelf frames
- Mechanical & engineering: Machine bases, transport trailer frames
- Agricultural projects: Farm greenhouse frames, livestock fencing
- Low‑pressure fluid delivery: Water supply, non‑corrosive liquid pipeline
FAQ
Q: Can you produce as per our national standard?
A:Yes, we manufacture MS tubes complying with ASTM, EN, BS, IS, AS/NZS standards, MTC supplied.
Q: What surface finish do you recommend for outdoor projects?
A: Hot‑dip galvanized is the best anti‑rust choice for long‑term outdoor exposure. Black painted / varnished finish suits indoor usage.
Q: Is ERW welded tube strong enough for structural building?
A: Absolutely. ERW hollow sections are widely accepted for global structural construction under relevant standards.
Q: What we can provide of packing & shipment?
A: Packaging & Shipment
- Standard packing: Hexagonal bundles with steel straps; waterproof plastic cap on tube ends
- Marking: Each bundle marked with standard, size, grade, heat number, brand mark (Brisk Steel)
- Container loading: 20GP / 40HC container shipment; bulk vessel for large volume orders
Hot Tags: mild steel tube, China mild steel tube manufacturers, suppliers, factory, durable hollow section, hollow section buyer, hollow section certification, hollow section louvers, hollow section rainwater systems, thin wall hollow section
