Cold-rolled Sections

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Product Overview

Precision cold-rolled C-shaped steel channels paired with induction-hardened bearing rails form rigid linear guide systems for industrial automation and mechanical enclosures. Engineered for high load-bearing capacity and consistent straightness, these profiles provide smooth linear translation and robust structural framing under dynamic loads. Supplied in standard mill lengths or custom-cut configurations with pre-punched mounting holes.

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C-shaped Steel Channel

C-shaped steel channel is one of our most commonly used cold-formed steel products. Its simple C-shaped cross-section gives it excellent load-bearing performance. It also offers easy connection

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Roll-formed Shape

Roll-Formed Shape is the core concept of our product line. It refers to all profiles with special cross-sections made through the cold roll forming process. Unlike standard C-channel and U-channel,

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Bracing Beam

The core advantage of Bracing Beam is its resistance to lateral loads and structural stability. products are mainly used in bracing systems for buildings and engineering structures. They effectively

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Roll Formed Channel

Roll Formed Channel is one of our most basic cold-formed products. It has a simple cross-section shape, stable mechanical properties, and a very competitive price. This makes it very popular in

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Structural Steel Sections

Structural Steel Sections are our core product line for the building and engineering construction sector. The main advantages are high strength, high precision, and good weldability. Our product use

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Steel Support Frame

The core advantages of Steel Support Frame are its flexible structural design and easy on-site installation. Our product is made of high-strength steel through cold roll forming. The section is

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Channel Beam

The advantages of Channel Beam are its simple cross-section shape, excellent mechanical properties, and low processing cost. It is one of the most widely used cold-formed steel products in

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Automotive Profiles

Automotive Profiles are designed to meet the combined demands of precision, strength, and lightweighting in the automotive industry. Automotive structural and functional parts often require

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Industrial Shelving Parts

The main advantages of Industrial Shelving Parts are load-bearing capacity and interchangeability between components. Our product include uprights, beams, shelves, connectors, and supports. All are

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Hollow Metal Window Frames

Hollow Metal Window Frames offer a combination of strength and fire resistance. Compared to aluminum window frames, steel frames have natural advantages in bending strength and fire rating. They are

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Bearing Rail

The key advantage of Bearing Rail is its surface hardness and wear resistance. These properties directly determine the service life of conveyor systems and automation equipment. Our product is made

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Aluminum Tubing

The advantages of Aluminum Tubing are its light weight, corrosion resistance, and excellent thermal conductivity. These properties make it widely used in automotive lightweighting, building

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Key Features

Cold-Formed Dimensional Stability

Tight cross-sectional tolerances (+/- 0.15 mm) achieved via multi-roll profiling lines.

Induction-Hardened Raceways

Contact surfaces induction-hardened to HRC 58 to 62 (depth 1.2 to 1.5 mm) to minimize wear under rolling carriage loads.

High Load Rating

Optimized web thickness and flange rigidity resist deflection under combined radial and moment loads.

Modular Compatibility

Standardized slot geometry interfaces with standard M-series fasteners and commercial bearing blocks.

Corrosion Resistance Options

Available in passivated zinc-plating, hot-dip galvanizing, or raw pickled finish for secondary welding.

Materials & Specifications

Technical Parameter	Standard Specification	Custom Options
Material Grades	Q235B, Q355B (Carbon Steel), SS304, SS316 (Stainless Steel)	45# Steel, Al-Mg Alloys
Channel Height	40 mm to 120 mm	Up to 200 mm
Wall Thickness	2.5 mm, 3.0 mm, 4.0 mm	1.5 mm to 6.0 mm
Standard Length	3,000 mm, 6,000 mm	Cut-to-length (+/- 0.5 mm)
Surface Finish	Zinc Plated (>= 8 um), Black Oxide, Mill Finish	Hot-Dip Galvanized (>= 65 um)
Straightness Tolerance	<= 0.5 mm per 1,000 mm	Precision grade <= 0.3 mm per 1,000 mm

Manufacturing Process & Shop Floor Insight

Slitting: Master steel coils slit to precise strip widths via multi-knife slitting lines to control edge burrs.

Roll Forming: Continuous progressive cold-rolling through 16 to 24 forming stands to gradually shape the C-profile without internal stress concentration.

High-Frequency Induction Hardening: Integrated inline heat treatment applied specifically to the rolling contact tracks.

Punching & Machining: CNC punching presses execute customer-specified mounting holes, slotted holes, and end tappings.

Surface Treatment: Automated electroplating or immersion pickling lines apply uniform protective coatings.

Manufacturing Capability

Production Lines: 6 automated cold roll-forming lines with inline laser welding and straightening units.

Output Capacity: 1,200 tons monthly output across standard and custom profiles.

Processing Equipment:

CNC fiber laser cutters for profile trimming.
High-speed multi-axis CNC punching machines for customized hole patterns.
Automated straightening presses ensuring camber and twist control.

Quality Control

Raw Material Verification: PMI spectrometer testing verifies chemical composition of incoming steel coils.

Dimensional Inspection: Laser profile projectors measure cross-sectional geometry continuously during rolling.

Hardness Testing: Rockwell hardness testers verify raceway surface hardness depth per batch.

Straightness & Twist Check: Granite surface plates and dial indicators measure deviation per 1,000 mm increment.

Salt Spray Testing: 96-hour neutral salt spray test verifies corrosion resistance for zinc-plated finishes.

Applications

Automated Guided Vehicles (AGV/AMR)

Load-bearing chassis framing and vertical lifting masts.

Industrial Material Handling

Telescopic forks for automated storage and retrieval systems.

Machine Tool Enclosures

Heavy-duty sliding doors and protective shielding tracks.

Medical Equipment

Imaging device movable gantries and patient table sliding mechanisms.

OEM & Customization

Drawing Review

Engineering team evaluates 2D and 3D CAD files within 24 hours for structural feasibility.

Tooling Development

In-house tool room manufactures custom roll-forming dies within 15 to 20 business days.

Prototyping

Rapid sample fabrication available for pre-production fit and load testing.

Traceability

Laser-etched batch numbers and material test certificates supplied with every shipment.

FAQ

Q: How do you prevent structural distortion or twisting during the cold-forming process?

A: Production lines utilize multi-stage progressive rollers combined with inline mechanical straightening units. This gradual redistribution of stress prevents residual edge-warp, maintaining straightness within 0.5 mm per meter.

Q: Can the C-channel bearing rails be supplied with custom mounting hole patterns?

A: Yes. CNC punching and laser cutting operations are integrated into the manufacturing line. Channels can be delivered with custom slotted holes, countersunk holes, or tapped mounting points per your CAD drawings, eliminating secondary machining.

Q: What is the standard corrosion protection for ocean freight shipping?

A: Standard carbon steel channels receive an alkaline zinc-plating (>= 8 um) passivated with clear trivalent chromate. Profiles are bundled with interleaving plastic film, secured in steel-strapped wooden crates, and lined with VCI paper to prevent transit oxidation.

Q: Are these bearing rails induction-hardened on the entire surface or specific tracks?

A: Only the rolling contact surfaces (raceways) undergo high-frequency induction hardening, achieving HRC 58 to 62 with a depth of 1.2 to 1.5 mm. The core and back web retain their original toughness to absorb dynamic structural loads without snapping.

Q: What documentation is provided to verify material compliance?

A: Every batch includes a Material Test Certificate conforming to EN 10204 3.1 standards, detailing raw steel chemical composition, tensile strength test results, and coating thickness test data.

Q: What are the minimum order quantities for custom cross-section profiles?

A: For non-standard profiles requiring new roller dies, the baseline minimum order quantity is 1,000 meters per run. For standard catalog profiles with custom hole patterns, the minimum order quantity starts at 300 meters.

As one of the most professional cold-rolled sections manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy high-grade cold-rolled sections made in China here from our factory. Contact us for pricelist and quotation.

Cold Rolled Profile, Industrial Shelving Uprights, Profile Steel Tube