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Help CenterSteel Channel & U Channel Steel & Channel Bar，Q235B、Q355B、GB/T706、SS400、A36
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Steel Billet，Main Materials Q195, Q235B, Q355B, 20#, 45#, SS400, A36, S235JR,NegotiableMOQ: 1 Metric Ton
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Steel Billet，Main Materials Q195, Q235B, Q355B, 20#, 45#, SS400, A36, S235JR,NegotiableMOQ: 1 Metric Ton
1. Product Overview
Channel steel, also named U channel, is hot rolled long structural steel with U-shaped groove cross-section, composed of vertical web and two flanges with uniform inner slope. It delivers outstanding bending resistance and lateral pressure bearing capacity, moderate self-weight and excellent performance for welding, riveting and bolt assembly. As core load-bearing profile widely used in steel construction, equipment bases, vehicle chassis and support frames, it is hot rolled from carbon and low alloy steel billets (stainless steel excluded), suitable for indoor and outdoor light & heavy load projects.
2. Product Classification, Process & Specifications
2.1 Hot Rolled Standard GB Channel Steel (Main In-Stock Item)
Applicable Standards: GB/T706-2016, ASTM A36, EN10279, JIS G3192Production Flow: Steel billet heating → rough rolling → finish forming → cooling & straightening → fixed-length saw cutting
Standard Sizes: 5#,6.3#,8#,10#,12.6#,14a/14b,16a/16b,18a/18b,20a/20b,25a/b/c,30a/b/c,40a/b/cSize Definition: Number represents web height (cm); suffix a/b/c stands for different flange width & thickness under same height
Standard Length: 6m,9m,12m; custom fixed length 5–19m available
Surface Finish: Hot rolled black surface with slight oxide scale, anti-rust oil coating optional
Dimensional Tolerance: Strict compliance with GB/ASTM/EN/JIS standards on height, flange width, web thickness, straightness & twist; section error ≤±0.5mm, weight deviation within ±3%
Advantages: Strong load capacity, complete sizes, sufficient stock for medium & heavy-duty structures
Applications: Main & secondary beams of factory buildings, equipment bases, steel platforms, bridge supports, semi-trailer girders
2.2 Hot Rolled Light Weight Channel Steel
Narrower flanges & thinner web under identical height, lower theoretical weight per meterSizes: 6.5#,8#,10#,12#,14#,16#,20# light seriesAdvantages: Material saving & cost effective; for roof purlins, curtain wall keels, light storage racks, simple indoor supports
2.3 Cold Formed Thin-Wall C Channel (Light Cold Rolled Channel)
Applicable Standard: GB/T6728Process: Cold bending from steel strips, thin wall & compact dimensionWall Thickness:1.2–4.0mm; Width range:50–300mmApplications: PV brackets, factory purlins, enclosure frames, small equipment supports
3. Common Material Grades, Mechanical Properties & Applications
3.1 Ordinary Carbon Channel Steel (Economical General Grade)
Grades: Q235B, A36, S235JR, SS400Mechanical Data: Yield strength ≥235MPa, Tensile strength 375–500MPa, Elongation ≥21%, qualified normal temperature impact testFeatures: Easy welding, good plasticity, low cost; factory frames, guardrails, common equipment supports, civil steel structures
3.2 Low Alloy High Strength Channel Steel (Outdoor Heavy-Duty & Low Temperature Grade)
Grades: Q355B/C/D, S355JR, ASTM A572 Gr50Mechanical Data: Yield strength ≥355MPa, excellent low-temperature impact toughness, resistant to wind, snow & dynamic loadsFeatures: 50% higher strength than mild carbon steel; PV brackets, container frames, vehicle chassis, bridge auxiliary components, steel structures in cold northern areas
4. Optional Anti-Corrosion Surface Treatments
Black surface with anti-rust oil: Original hot rolled finish, short-term rust protection, lowest cost for indoor projects
Hot-dip galvanized channel steel: Zinc coating weight 200–600g/㎡, resistant to rain and coastal salt fog for municipal, PV & outdoor steel structures
Sand blasting + paint / epoxy zinc-rich coating: Anti-rust coating after rust removal, beautiful & durable for equipment housings and landscape steel structures
5. Core Quality Inspection Indicators
Chemical Composition: Strict control of C, Si, Mn, S, P; low content of harmful impurities sulfur & phosphorus to avoid cracking during welding & hot working
Surface Appearance: Free of lamination, scabs, cracks and pits; uniform inner flange slope without edge collapse or excessive twist
NDT Inspection: UT ultrasonic testing available for large-size heavy-load channels to eliminate internal looseness & slag inclusion
Machinability: Support saw cutting, drilling, beveling, bending, welding & riveting without pre-annealing
6. Auxiliary Processing Services
Fixed-length saw cutting: Custom cutting to required length with smooth burr-free cutting face
Punching & bevel processing: Pre-fabricated bolt holes and welding bevels for direct on-site assembly
Hot-dip galvanizing OEM service: Galvanizing processing for bare channel steel
Sand blasting & rust removal: Eliminate surface oxide scale to improve coating adhesion
7. Packaging, Delivery & Foreign Trade Terms
7.1 Seaworthy Export Packaging
Standard bundling: Channel steel aligned and fastened with multi-layer steel strips, 1–5 tons per bundle; size, material grade and heat number sprayed on both ends
Export dedicated package: Wrapped with anti-rust kraft paper inside, fully covered by moisture-proof PE film, fixed on fumigated solid wood pallets to prevent seawater corrosion and transport collision
7.2 Delivery Lead Time
Standard in-stock hot rolled black channel steel: Shipment within 5–7 daysGalvanized processing, non-standard custom length & large size 40# series: 7–15 days
7.3 Shipping Ports
Tianjin Port and Qingdao Port, supporting full container 40GP/40HC and LCL shipments. Complete export documents supplied: Material Test Certificate, English third-party inspection reports (SGS/BV), Packing List, Commercial Invoice; FTA Certificate of Origin can be issued.
7.4 Payment Terms
30% TT advance payment, balance settled before shipment. Letter of Credit (LC) is not acceptable.Minimum order quantity: 1 ton, mixed loading of multiple sizes & grades supported.
8. Downstream Application Industries
Steel Construction: Columns & beams of industrial factories, steel platforms, canopies, fence columns, roof purlins
New Energy Industry: PV ground & rooftop brackets, auxiliary support frames for wind power equipment
Transportation & Vehicles: Semi-trailer girders, truck chassis, container frames, road & bridge guardrails
Machinery & Heavy Industry: Machine tool bases, fan supports, pump frames, load-bearing bases for heavy equipment
Municipal Engineering: Bus stations, landscape steel structures, municipal pipeline supports, curtain wall keels
9. Core Product Advantages
Full size coverage: One-stop supply of 5#–40# GB hot rolled channel, light channel and cold formed C channel with sufficient stock
Complete material options: Two series of mild carbon & low alloy high strength steel for light/heavy loads and high/low temperature environments
Excellent process adaptability: Stable forming for cutting, welding, punching and galvanizing deep processing to boost construction efficiency
Traceable reliable quality: Rolled from official steel mill billets, full physical & chemical test reports attached for each batch with traceable heat numbers; third-party inspection acceptable
Mature export service: Standardized moisture-proof seaworthy packaging, full set of English customs clearance documents, compliant with global procurement standards
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