Carbon Steel Channel | C-Channel & U-Channel Steel (A36, Q235, S355JR)
Huaxia Steel — Professional Carbon Steel Channel Supplier
15+ years of experience | ISO 9001 & SGS Certified | C-channel & U-channel | Custom lengths | Global shipping
What is Carbon Steel Channel?
Carbon steel channels are C-shaped or U-shaped structural steel profiles with two flanges and a web connecting them. They provide excellent strength-to-weight ratio for structural support, bracing, and load-bearing applications. Huaxia Steel supplies a comprehensive range of carbon steel channels including Chinese standard channels (GB/T 706), European UPN channels (EN 10279), and American C-channels (ASTM A6), in hot-rolled and galvanized finishes for construction, machinery, and infrastructure projects.
Need Carbon Steel Channels for Your Project?
We offer C-channel, U-channel, and UPN profiles in all standard sizes with galvanized finish options.
Available Grades & Standards
| Grade | Standard | C% | Yield (MPa) | Tensile (MPa) | Application |
|---|---|---|---|---|---|
| Q235B | GB/T 700 | 0.12–0.20 | ≥235 | 375–500 | General structural use |
| Q345B | GB/T 1591 | ≤0.20 | ≥345 | 470–630 | Heavy structural / bridges |
| A36 | ASTM A36 | 0.25–0.29 | ≥250 | 400–550 | General construction |
| A572 Gr50 | ASTM A572 | ≤0.23 | ≥345 | 450–620 | High-strength structural |
| SS400 | JIS G3101 | ≤0.15 | ≥245 | 400–510 | General construction |
| S235JR | EN 10025-2 | ≤0.17 | ≥235 | 360–510 | EU standard structural |
| S355JR | EN 10025-2 | ≤0.22 | ≥355 | 470–630 | EU high-strength structural |
Dimensions & Specifications
| Standard | Size Range | Depth (h) | Flange (b) | Web (t) | Length |
|---|---|---|---|---|---|
| GB/T 706 (Chinese) | 5# – 40# | 50–400mm | 37–104mm | 4.5–21mm | 6m / 9m / 12m |
| EN 10279 (UPN) | UPN 80 – UPN 400 | 80–400mm | 45–110mm | 5–19mm | 6m / 12m |
| ASTM A6 (C-Ch) | C3 – C15 | 76–381mm | 41–89mm | 4.3–18.7mm | 6m / 12m / 20ft |
| JIS G3192 | 75×40 – 400×100 | 75–400mm | 40–100mm | 5–13mm | 6m / 12m |
Manufacturing Process
Carbon steel channels are produced through hot rolling:
Billet Heating: Steel billets are heated to 1100–1250°C for uniform plasticity.
Universal Mill Rolling: The billet passes through a roughing mill and then a universal mill with horizontal and vertical rolls that simultaneously shape the web and flanges, forming the C/U cross-section. Precision pass design ensures accurate dimensions and tight tolerances.
Cooling & Cutting: Channels are air-cooled on cooling beds to room temperature, then cut to standard lengths by hot or cold shearing.
Straightening (Optional): Roller straighteners correct any warping or twisting that occurs during cooling, achieving straightness within 2mm per meter.
Surface Finish & Treatment Options
Available surface treatments:
– Hot Rolled (Black): Standard mill finish with oxide scale
– Hot-Dip Galvanized (HDG): Zinc coating for corrosion resistance (40–100 µm)
– Painted: Anti-corrosion primer or topcoat per specification
– Sandblasted & Primed: Surface preparation for on-site welding
– Cold Formed (Lightweight): Roll-formed from sheet for lighter-duty applications
Common Applications
- Structural steel framing for buildings, warehouses, and industrial facilities
- Bridge construction: cross-beams, supports, and diaphragms
- Shipbuilding: hull framing, deck beams, and bulkhead stiffeners
- Vehicle chassis frames and trailer structures
- Machinery supports, equipment bases, and crane rails
- Cable trays and electrical conduit supports
- Solar panel mounting brackets and racking systems
- Mezzanine flooring support and mezzanine structural frames
Why Choose Huaxia Steel as Your Carbon Steel Channel Supplier?
Factory-Direct Pricing
Eliminate middlemen. Our direct mill partnerships ensure competitive pricing on every order, from small prototype quantities to full container loads.
Certified Quality
Every shipment includes full mill test certificates (MTC/EN 10204 3.1). ISO 9001:2015 certified. Third-party SGS inspection available on request.
Custom Processing
Cut-to-size, precision slitting, bending, welding, galvanizing, and surface treatment services. We deliver material ready for your production line.
Fast Global Logistics
Efficient shipping to North America, Europe, Middle East, Southeast Asia, and beyond. Standard lead time 7–15 days for stock items.
Frequently Asked Questions
What is the difference between C-channel and U-channel?
C-channel and U-channel refer to the same cross-sectional shape—a vertical web with two horizontal flanges. In North American practice, they are called ‘C-channels’ (ASTM A6). In European practice, they are called ‘U-channels’ or ‘UPN’ (EN 10279). In Chinese standards (GB/T 706), they are simply called ‘channel steel’. The shapes are functionally identical.
What does ‘5#’ channel steel mean?
In the Chinese GB/T 706 standard, channel sizes are designated by number. ‘5#’ (or No.5) refers to a channel with a nominal depth of 50mm. Similarly, ’10#’ is 100mm depth, ’20#’ is 200mm, and ’40#’ is 400mm. This numbering system is unique to Chinese standards.
What is the standard length of channel steel?
Standard lengths are 6 meters, 9 meters, and 12 meters. American standard C-channels are also available in 20-foot (6.1m) and 40-foot (12.2m) lengths. Custom lengths can be cut to your requirements.
How do I calculate the weight of a channel?
Weight per meter = [h × t × 2 + (b – t) × t] × 0.00785 kg/mm, where h = depth, b = flange width, t = web thickness (all in mm). For standard sizes, refer to the GB/T 706 or EN 10279 specification tables for exact weights.
Ready to Order Carbon Steel Channels?
Factory-direct pricing. ISO & SGS certified quality. Cut-to-length available. Get your quote in 12 hours.
