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ASTM A36 41×21 41x41mm Slotted C Channel Steel | HDG Solar Mounting Channel
Product Overview
ASTM Slotted C Channel Steel is a galvanized channel for structural use in solar mounting systems, steel framing, cable tray, equipment mounting, and industrial applications. The channel is available in thickness of 1.0mm, 1.2mm, 1.5mm and 2.0mm. The channel features pre-punched slots which allow for fast and flexible installation.
Royal Steel Group offers HDG Slotted C Channel in customized sizes and lengths and with your choice of hole patterns to suit your projects.
Product Detail
| Item | Specification |
| Product | HDG C Channel |
| Steel Grade | ASTM A36,A572 |
| Thickness | 1.0,1.2,1.5,2.0,2.5 |
| Surface | Hot-Dip Galvanized |
| Profile | C Channel / Slotted C Channel |
| Length | Standard or Customized |
| Slot Pattern | Customized |
| Application | Solar Mounting, Construction, Industrial Structures |
KEY FEATURES
1.Hot-Dip Galvanized Surface – Enhanced corrosion resistance for outdoor and humid environments.
2.Slotted Options – Pre-punched slots allow quick and adjustable bolted connections.
3.Custom Dimensions – Width, height, length, thickness, and slot patterns can be customized.
4.Easy Fabrication – Suitable for cutting, drilling, welding, and assembly.
5.Export Ready – Professional bundling and packaging for container and bulk shipment.
Hot-Dip Galvanized Steel C Channel Chemical Composition & Mechanical Properties
ASTM A36 Chemical Composition
| Standard | C | Mn | P | S | Si | Cu |
| ASTM A36 | ≤0.26% | — | ≤0.040% | ≤0.050% | ≤0.40% | ≥0.20%* |
Note:
* The manganese content of ASTM A36 varies depending on the product type, thickness, and manufacturing specifications; not all A36 products have a uniform maximum value.
** Copper content requirements generally apply to specified weathering/copper steel conditions; specific requirements should be based on purchasing standards and MTC.
ASTM A36 Mechanical Properties
| Standard | Yield Strength | Tensile Strength | Elongation | Elastic Modulus | Poisson's Ratio |
| ASTM A36 | ≥250 MPa (36 ksi) | 400–550 MPa (58–80 ksi) | ≥20% | ≈200 GPa | ≈0.26–0.30 |
Note: The specific chemical composition limits for A36 vary depending on the product form (plate, section, bar, etc.) and the applicable ASTM clauses. It is recommended to determine the final table according to the specific product standard and MTC to avoid directly applying the A36 composition of plate to formed channel steel.
Hot-Dip Galvanized Steel C Channel Size
| No. | Size | Thickness | Type | Surface Treatment | ||
| mm | inch | mm | Gauge | |||
| A | 41x21 | 1-5/8x13/16" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| B | 41x25 | 1-5/8x1" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| C | 41x41 | 1-5/8x1-5/8" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| D | 41x62 | 1-5/8x2-7/16" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
| E | 41x82 | 1-5/8x3-1/4" | 1.0,1.2,1.5,2.0,2.5 | 20,19,17,14,13 | Slotted, Solid | GI,HDG,PC |
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Hot-Dip Galvanized Steel C Channel Manufacturing Process
The manufacturing process of hot-dip galvanized steel C channel combines precision steel forming with zinc coating technology to provide structural strength and corrosion resistance for construction, solar mounting, and industrial applications.
1. Raw Material Preparation
Steel coils, commonly carbon structural steel such as ASTM A36, are inspected for thickness, width, chemical composition, and surface condition before production.
2. Slitting
The steel coil is slit into the required strip width according to the final C channel dimensions.
3. Roll Forming
The steel strip passes through a series of precision forming rollers to create the C-shaped profile. Channel height, flange width, lip size, and thickness are controlled during this process.
4. Punching & Cutting
For slotted C channel, holes or elongated slots are punched according to the required spacing and pattern. The formed channel is then cut to the specified length.
5. Hot-Dip Galvanizing
The steel C channel is cleaned, pickled, and fluxed before being immersed in molten zinc. The zinc coating forms a protective layer on the steel surface, improving corrosion resistance.
6. Inspection & Quality Control
Finished galvanized C channels are checked for dimensions, straightness, slot accuracy, surface condition, and zinc coating requirements. MTC and third-party inspection can be provided when required.
7. Packaging & Delivery
The finished C channels are bundled with steel straps and prepared for container or bulk shipment.
Surface Finish
The HDG (Hot-Dip Galvanized) coating provides enhanced protection against moisture and atmospheric corrosion. Zinc coating specifications can be customized according to project requirements.
For higher corrosion-resistance requirements, Royal Steel Group can discuss suitable coating specifications based on the installation environment.
Common Surfaces
Application
Hot-Dip Galvanized Steel C Channel is very popular in the machinery, hardware, automobile, decoration and other industries due to its good performance in strength, easy installation and corrosion resistance.
Solar Mounting Systems: Used for solar panel mounting structures, PV support frames, rails, and connection systems.
Steel Framing: Suitable for light structural framing, equipment supports, and secondary steel members.
Cable & Pipe Support: Used for cable trays, pipe supports, mechanical equipment supports, and utility installations.
Industrial Construction: Commonly used in warehouses, workshops, factories, and other industrial structures.
Custom Fabrication
Royal Steel Group can provide customized processing according to customer drawings.
Available services include:
1.Custom length cutting
2.Slot punching
3.Hole punching
4.Drilling
5.Welding
6.Surface treatment
7.Customized packaging
Standard lengths such as 6 m and 12 m are available, while customized lengths can be produced according to project requirements.
Why Choose Royal Steel Group
Royal Steel Group supplies hot-dip galvanized steel C channels for solar mounting, construction, and industrial projects, with flexible specifications and professional export services.
1.Custom Production – Channel dimensions, slot patterns, lengths, and zinc coating can be customized.
2.Quality Inspection – Dimensional, material, coating, and appearance inspection before shipment.
3.Factory-Direct Supply – Competitive pricing with direct production and export service.
4.Complete Documentation – MTC, inspection reports, and shipping documents available.
5.Global Delivery – Experience supplying steel products to customers in international markets.
Packaging & Shipping
Slotted C Channel Steel is normally packed in bundles with protective materials and securely loaded for container transportation. Packing methods can be customized according to product dimensions, quantity, destination, and customer requirements.
For standard production orders, lead time depends on quantity, specifications, coating requirements, and production schedule.
FAQ
Q1: Is the strut channel available with slots?
A: Yes. Both slotted and plain versions are available. Slotted channels provide greater flexibility for positioning and adjustment during installation.
Q2: What thicknesses are available?
A: Common thicknesses include 1.5 mm, 2.0 mm and 2.5 mm, with other thicknesses available depending on the product and project requirements.
Q3: What lengths are available?
A: Common lengths include 6 m and 12 m, while custom-cut lengths can be supplied according to requirements.
Q4: Can you provide hot-dip galvanized strut channel?
A: Yes. Royal Steel Group supplies HDG, pre-galvanized and other surface-treated strut channels for different environments and applications.
Q5: Can I order custom strut channel?
A: Yes. Customers can specify size, thickness, slot pattern, material, surface treatment, length, quantity and packaging requirements for a customized quotation.
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