304/304L Stainless Steel Channels

Good Corrosion Resistance: Excellent resistance to oxidation and corrosion in fresh water, mild chemical media, atmospheric conditions, and food products. The 304L grade provides additional protection against intergranular corrosion after welding.

Excellent Formability: 304/304L stainless steel offers superior forming characteristics, making it ideal for bending, cutting, drilling, and fabrication operations.

Cost-Effective Solution: Lower alloy content (no molybdenum) compared to 316/316L makes 304/304L a more economical choice for applications where chloride-induced pitting is not a concern.

Good Mechanical Strength: Good tensile and yield strength with excellent ductility for structural applications, suitable for light to medium load-bearing frameworks.

Superior Weldability: 304L grade ensures low carbon content for superior weld performance, with reduced risk of intergranular corrosion in welded fabrications.

Precision Dimensional Tolerances: Tight tolerances on web height, flange width, thickness, and straightness ensure consistent quality for structural assemblies.

Smooth Surface Quality: Available in annealed and pickled finish (standard), polished, or brushed finishes for architectural and exposed applications.

Multiple Channel Types: U channels (standard channels), C channels, parallel flange channels, and cold-formed channels available.

Aesthetic Appearance: Bright silver finish provides excellent visual appeal for exposed structural elements in architectural applications.

International Certifications: Channels can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with ASME and EN standards.

The lower carbon content in 304L minimizes carbide precipitation during welding, providing enhanced resistance to intergranular corrosion compared to standard 304, especially in welded structural applications exposed to the sensitization temperature range (425–870°C).

Heat Treatment Condition:
Both 304 and 304L stainless steel channels are normally supplied in the annealed and pickled condition. Solution annealing at 1010–1080°C followed by rapid cooling restores full corrosion resistance, relieves internal stresses from rolling, and ensures optimal ductility for fabrication.

Delivery Condition:
Channels are normally supplied in annealed and pickled condition, providing a clean, smooth surface and good corrosion resistance. Upon request, polished, brushed, or bright annealed finishes can be provided for architectural applications.

Note: Custom sizes, unequal channels, and longer lengths available upon request.

Raw Material Selection: High-quality 304/304L stainless steel slabs from certified mills with certified chemical composition.

Heating: Slabs heated to 1150–1250°C for hot rolling.

Hot Rolling: Heated slabs passed through roughing and finishing stands to form channel shape.

Cooling: Controlled cooling to prevent distortion and maintain dimensional accuracy.

Straightening: Roller straightening to ensure straightness tolerance within 2 mm per meter.

Solution Annealing: Heat treatment at 1010–1080°C for optimal corrosion resistance.

Pickling & Passivation: Removal of oxides and creation of passive film.

Cutting: Cut to standard 6-meter lengths (or custom lengths per order).

Inspection & Marking: Each bundle inspected, marked with grade, heat number, dimensions, and standard.

Chemical Analysis: Spectrometer or PMI verification of alloy elements (Cr 18-20%, Ni 8-12%).

Mechanical Testing: Tensile strength, yield strength, elongation, hardness per ASTM A370.

Dimensional Inspection: Web height, flange width, thickness, squareness, straightness, length.

Surface Inspection: Visual check for surface defects, cracks, and consistency.

Intergranular Corrosion Test: ASTM A262 Practice E for 304L (upon request).

Third-Party Inspection: SGS, BV, DNV, TUV, LR available upon customer request.

General Industrial Fabrication: Equipment frames, workbenches, machine guards, conveyor supports, storage racks, work platforms.

Food & Beverage Industry: Processing equipment frames, conveyor supports, work platforms, dairy equipment structures, brewery framing.

Pharmaceutical Cleanrooms: Cleanroom framing, equipment supports, sanitary structures, process line supports, wall framing.

Architectural & Construction: Building frameworks, handrails, balustrades, stair stringers, curtain wall supports, structural glazing supports.

Water Treatment Plants: Filter frame supports, tank stiffeners, pipe support structures, walkway framing, access platforms.

HVAC Systems: Equipment frames, duct supports, fan bases, chiller platforms.

Storage & Shelving: Pallet racks, shelving frames, industrial shelving, warehouse racking supports.

Transportation (Limited): Railcar components, trailer interior framing, container fittings.

Interior Design: Furniture frames, display fixtures, retail store fittings, exhibition stands.

Standard Packaging:

Bundles with steel straps and woven fabric wrapping

Plastic end protection for cut edges

Wooden pallets for export sea-worthy transport

Individual bundle labeling with grade, heat number, dimensions, quantity

Womic Steel's Delivery Strengths:

Direct cooperation with global shipowners – competitive freight rates

Professional loading and securing teams prevent bending and damage

Efficient document preparation minimizes customs delays

Rapid delivery time – standard sizes kept in ready stock

Continuous cargo tracking and after-sales follow-up

1. What is the difference between 304 and 304L stainless steel channels?
The main difference is carbon content. 304L has lower carbon (≤0.03% vs ≤0.08%), which prevents carbide precipitation during welding and provides better resistance to intergranular corrosion. For welded structural applications, 304L is typically preferred.

2. Can 304 stainless steel channels be used in marine environments?
No. For seawater or high-chloride environments, use 316/316L or duplex stainless steel channels. 304/304L is not suitable for marine applications.

3. What is the standard length for stainless steel channels?
Standard length is 6 meters (20 feet). Custom lengths from 1m to 12m available upon request.

4. What is the difference between U channel and C channel?
U channel has tapered flanges typical of hot-rolled sections. C channel has parallel flanges, often from cold-forming or precision hot-rolling.

5. Do you provide material test reports (MTR) and certification?
Yes, every shipment includes EN 10204 Type 3.1 MTR with chemical analysis and mechanical properties. Third-party inspection available upon request.

Cost-Effective: Most economical stainless steel channel option for general service

Complete Size Range: From 50mm to 250mm web height – all standard sizes in stock

Strict Quality Control: ISO 9001 and PED certified

Full Traceability: Heat number on each bundle – traceable to raw material

Flexible Customization: Special lengths, surface finishes, and custom drilling

Large Inventory: Over 5,000 tons in stock – ready for immediate dispatch

Global Delivery: Exported to over 50 countries with reliable logistics support

Website: www.womicstainless.com

E-mail: info@womicstainless.com

Tel / WhatsApp / WeChat:

Victor: +86 15575100681

Jack: +86 18390957568

Womic Steel – Your reliable partner for high‑quality stainless steel products, precision machined components, and custom solutions for corrosion‑resistant applications.

Stock Examples (304L Stainless Steel Channels – Annealed & Pickled – General Industrial Grade):

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