Carbon Steel Rectangular Tube

Commodity name： Carbon Steel Rectangular Tube

Square and rectangular tubes are among the most common and best-used profiles in steel structures because they are resistant to bending and pressure, easy to weld, easy to install, and easy to fix, covering almost all scenarios in construction, industry, municipal engineering, and home decoration.

subcategory：

Hollow Section

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008613821394999

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Details

产品描述

- Product name: Carbon Steel Rectangular Tube / Carbon Steel Rectangular Hollow Section / Carbon Steel Box Section
- Manufacture: Cold-formed & Hot Formed / ERW / SMLS
- Coating: bare, oiled, painted, galvanized, etc.
- Port of loading:Tianjin xingang port of China.
- Brand:Tianjin Brisk Steel
PRODUCT
Tianjin Brisk Steel focus on produce and supply hollow section and steel pipe
Spray Painting
Spary Painting
Oiled Coating
Hot Dip Galvanized Coating
- The surface treatment commonly used for square and rectangular tubes directly determines their rust resistance, appearance, cost, and service life.
- Black Tubes:
  Process: Cold formed / No surface treatment after welding, retaining the original color of the steel
  Appearance: Grayish-black, with oxide scale
  Features: Cheapest, easy to process
  Disadvantages: Extremely prone to rusting, only suitable for short-term indoor use
- Hot-dip galvanizing (Hot-dip zinc plating) – Most commonly used for outdoor applications:
  Process: Square tubing is immersed in high-temperature molten zinc, forming an alloy layer between zinc and steel.
  Appearance: Silver-gray with zinc bloom on the surface.
  Features: Extremely strong corrosion resistance; suitable for outdoor use for 10–30 years. Thick coating, impact-resistant, and resistant to acids, alkalis, and rainwater.
  Applications: Outdoor railings, awnings, curtain wall framing; greenhouses, streetlight poles, steel structures, factory frames; ideal for coastal, humid, and corrosive environments..
- Electro-galvanizing (Pre - galvanizing):
  Process: Electrolytically depositing a thin zinc layer
  Appearance: Bright silver, attractive but the coating is very thin
  Features: Lower cost than hot-dip galvanizing, Most rust-resistant, prone to rusting outdoors
  Applications: Indoor decoration, furniture, display racks
  Suitable for applications requiring light rust prevention and a bright appearance
- Spray painting:
  Process: Rust removal → Primer → Topcoat/Powder high-temperature curing
  Appearance: Colors can be customized (black, white, gray, blue, etc.)
  Features: Beautiful and highly decorative; Moderate rust resistance, susceptible to scratches
  Applications: Indoor shelves, railings, doors and windows; Architectural decoration, landscaping
- Oil coating:
  Process: Rust removal, phosphating, sealing, and rust-preventive oil application
  Appearance: Natural metallic color with an oily feel
  Features: Short-term rust prevention
  Applications: Temporary protection before factory processing, inventory protection
- The anti-corrosion ability level is as follows:
  Black tubes<Oil coating<Spray painting<Pre galvanizing<Hot dip galvanizing
Two main manufacturing processes for square and rectangular tubes
Process Type: ERW / SMLS
1. Erw cold-formed square and rectangular tubes (95% market usage)
OD(MM): 20X30MM TO 400X600MM
WT(MM): ≤16MM
LENGTH(M): 5.8M, 6M, 12M Or Customer Required
2. Seamless round-to-square conversion process (seamless square and rectangular tubes)
- Large square tubes with wall thicknesses greater than 16mm are difficult to weld into shape using steel strips. They are generally made by cold drawing seamless round tubes into square shapes.
- Or it may be used in harsh environments, such as pressurized conditions, explosion-proof conditions, heavy-duty vibration, precision machinery, or where welding is strictly prohibited.
Complete Steel Grade For Your Square Steel Pipe
- BRISK STEEL has a wide range of steel grades, which can meet the special needs of customers from various countries for square pipe steel grades:
  The common American standard steel grade is Gr A/B/C,etc.
  European standard steel grade: S235/275/355/420/460, etc;
  Japanese standard steel grade: SS400, STKR400,STKR490,etc;
  Chinese steel grade: Q195/235/355, etc;
  Australia/New Zealand standard steel grade: C350, C350L0, C450, C450L0,etc;
  Canadian steel grade: 300W/350W, etc
- Please send your steel grade requirements now for a detailed quotation.
Why do people prefer square and rectangular tubes?
Square/rectangular cross-section: Easier to splice, screw-fix, and weld than round tubes.
Uneven stress distribution: Strong resistance to bending, torsion, and compression.
Easy construction: Simple to cut, drill, weld, and paint.
High cost-performance ratio: High-frequency welded square and rectangular tubes are inexpensive and readily available

Core Advantage

Brisk Steel Group is rooted in a culture of "technology as the backbone, quality as the soul, and customers as the heart." Through relentless innovation, global expansion, and a commitment to responsibility, we strive to become a trusted global partner and a technological benchmark in the steel manufacturing industry.

Craftsmanship with Precision

We adhere to a rigorous quality control system that spans the entire production process—from raw material procurement and manufacturing to product delivery—ensuring the highest standards of excellence.

Innovation-Driven Technological Leadership

We prioritize R&D and technological advancement, integrating cutting-edge production lines (e.g., JCOE large-diameter LSAW pipe production) and expert teams from countries like Germany and the Netherlands to maintain our position at the forefront of the industry.

Globalization and Open Collaboration

Actively engaging in the global supply chain, we have obtained international certifications such as CE marking, enabling our products and services to reach worldwide markets.

Professional Team and Talent Empowerment

We value the recruitment and development of technical talent, building an international and professional team that drives continuous growth.

Hollow Structural Steel Tube