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ST37 ST52 U Channel & C Channel Steel Sections – Technical Specifications & Product Data

Technical product details for U Channel (GB Standard/Lightweight Channel) and C Channel (C-Purlin/Lipped C-Purlin) steel sections, including material grades, dimensions, production processes, and applicable standards for structural and industrial use.

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product details

Key Features

High Strength: Q235B/Q355B grades ensure excellent load-bearing capacity for Indian construction projects.

Versatile Sizing: Available in standard and custom dimensions to fit diverse structural needs.

Corrosion Resistance: Hot-dip galvanized option ideal for India’s humid and coastal environments.

Easy Fabrication: Compatible with cutting, drilling, welding, and cold bending processes.

Steel Channel Standards And Grades

ISO 657-1, ASTM A36, ASTM A527, EN 10034, JIS G3101, BS 4-1, DIN 1026, DIN 17100 etc.

According to different application environments, choose the appropriate steel grade.

Item	Details
Type & Series	GB Standard Channel, Lightweight Channel
Steel Grade	China Standard: Q235B, Q355B ASTM: A36, A572 Gr.50 European Standard: S235JR, S275JR, S355JR
Standard	GB/T 706, ASTM A6/A6M, EN 10279
Size Designation	(h) x (b) x (d)Example: 200mm x 75mm x 9.0mmEuropean Standard: UPE 200, UPN 180
Process	Hot Rolled
Surface Treatment	Black , Hot-Dip Galvanized, Painted, Shot Blasted
Category	Cutting / Drilling & Punching / Welding / Cold Bending

Item	Details
Type	C-Purlin, Lipped C-Purlin
Steel Grade	Q235, Q345, S350GD, S280GDASTM: A653 SS Gr.550, Gr.345
Standard	GB/T 6725, ASTM A1003, EN 10162
Section Dimensions	Total Height (H) x Leg Width (B) x Lip (C) x Thickness (T)Example: 100mm x 50mm x 20mm x 2.0mm
Common Series	C80, C100, C120, C140, C160, C180, C200, C220, C250
Thickness (T)	1.2mm – 3.0mm
Length	1m – 12m
Process	Cold Roll Forming
Surface Treatment	Galvanized

Surface Finish

(1)Hot-rolled (as-rolled).

(2)Cold-rolled (smooth finish).

(3)Galvanized (corrosion-resistant).

Application

Building Construction: Roof trusses, wall frames, and secondary structural supports for residential, commercial, and industrial buildings.

Infrastructure: Bridges, highways, and railway infrastructure components.

Industrial Use: Warehouse racks, machinery frames, and conveyor systems.

Agriculture: Farm sheds, poultry houses, and storage structures.

Hot-Rolled Carbon Steel Channel A36 S235JR Q235B for Building Framing (3)

Hot-Rolled Carbon Steel Channel A36 S235JR Q235B for Building Framing (2)

Advantages

●High strength and stability: The cross-section is designed in a "concave" shape, with excellent bending and compression resistance, especially suitable for transverse force structures (such as beams and brackets).
●Convenient and efficient construction: Standardized specifications are convenient for quick cutting, welding or bolting, and are suitable for modular construction needs. It can be flexibly combined with other steel sections (such as I-beams and angle steels) to form a stable frame structure.
●Economical and practical: The cost of hot-rolled channel steel is low, and the cost performance is higher than that of some special-shaped steels. The maintenance cost is low, and the service life can reach more than 20 years after surface galvanizing, reducing the frequency of replacement.
●Wide application scenarios: Construction field, Mechanical field, Emerging fields.
●Environmental adaptability: Cold-bent channel production consumes less energy and is suitable for light environmental protection projects.

Packaging and Shipping

Standard Export Packaging: Securely bundled with steel strapping or wrapped in protective materials. Available shipping options include:

●Containerized sea freight

●Bulk sea freight

●Air freight

●Land transportation

●Intermodal (multimodal) logistics solutions

For custom requirements, feel free to contact us!

Hot-Rolled Carbon Steel Channel A36 S235JR Q235B for Building Framing (4)

Hot-Rolled Carbon Steel Channel A36 S235JR Q235B for Building Framing (1)

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Q: What are the main differences between U Channel and C Channel?

A:U Channel: Produced via hot rolling, used for primary structural load-bearing members, available in thicker sections, and conforms to standards like GB/T 706, ASTM A6/A6M, and EN 10279.

C Channel: Produced via cold roll forming, used for secondary structural members , features a lipped profile, and conforms to standards like GB/T 6725, ASTM A1003, and EN 10162.

Q: What steel grades are available for the Indian market?

A:U Channel: Q235B, Q355B (Chinese standard); A36, A572 Gr.50 (ASTM); S235JR, S275JR, S355JR (European standard).

C Channel: Q235, Q345, S350GD, S280GD; ASTM A653 SS Gr.550, Gr.345.

Q. What surface treatments are available?

A:U Channel: Black (as rolled), hot-dip galvanized, painted, or shot blasted.

C Channel: Standard galvanized surface for corrosion resistance.

Q: What are the typical applications in India?

A:U Channel: Primary structural supports in buildings, bridges, and industrial machinery.

C Channel: Roofing purlins, wall framing, warehouse racks, and agricultural structures.

Q: Can custom lengths or dimensions be provided?

A:Yes, custom lengths (within 1m–12m for C Channel) and non-standard dimensions can be manufactured to meet project-specific requirements.

Q: What is the lead time for orders to India?

A:Lead times vary by order volume and production schedule; typical delivery to major Indian ports (Mumbai, Chennai, Kolkata) is 3–5 weeks after order confirmation.