Cold-Formed Carbon Steel Hollow Sections
01. Product Overview
The right hollow section starts with the right profile. Round, square and rectangular cold-formed carbon steel hollow sections serve different structural and fabrication requirements. Choosing the correct cross-section, wall thickness and steel grade helps match the supplied material to the intended design and processing needs.
We supply cold-formed ERW carbon steel hollow sections for structural fabrication, machinery manufacturing, equipment frames and support structures.
Our product range includes three main profiles:
- Round Hollow Sections: Used for tubular structural members, machinery components, equipment supports and fabricated steel assemblies.
- Square Hollow Sections: Used for columns, structural frames, equipment bases and support structures requiring square profiles.
- Rectangular Hollow Sections: Used for building frames, machinery structures and brackets where different width and height dimensions are required.
Cold forming shapes steel strip or coil into the required cross-section. In ERW production, electric resistance welding joins the formed edges along a longitudinal seam to create the hollow steel profile.
02. Product Specifications & Selection
We supply carbon steel hollow sections with specifications selected according to the required profile, material standard and application.
| Profile | Round, Square, Rectangular |
|---|---|
| Manufacturing Process | Cold Forming, Electric Resistance Welding (ERW) |
| Material | Carbon Steel |
| Product Standard | ASTM A500/A500M |
| Steel Grade | According to applicable material standard and order specification |
| Round Section Dimensions | Outside Diameter |
| Square Section Dimensions | Width × Height |
| Rectangular Section Dimensions | Width × Height |
| Wall Thickness | According to structural and fabrication requirements |
| Length | Random Length, Fixed Length |
| Surface Treatment | Black, Hot-Dip Galvanized, Electro-Galvanized, Anti-Rust Oil, Protective Coating |
| End Processing | Plain End, Beveled End, Threaded End, Grooved End, subject to product applicability |
| Inspection | Dimensional, material and weld-quality inspection according to applicable requirements |
| Documentation | Material Test Certificate and applicable Inspection Records |
How to select the right profile
Round hollow sections are commonly selected for tubular members and mechanical structures. Square sections provide four-sided profiles for columns, frames and equipment supports. Rectangular sections offer different width and height proportions for structures and equipment layouts where the two dimensions have different requirements.
For accurate selection, consider outside dimensions, wall thickness, steel grade and the applicable standard together. These specifications should match the structural design and fabrication requirements of the finished product.
03. Customization & Processing Options
We offer the following specification and processing options to match different fabrication and purchasing requirements.
Profile and dimensions
- Round, square and rectangular cross-sections.
- Specified outside diameter or width and height.
- Required wall thickness.
- Random or fixed lengths.
Material and surface treatment
- Carbon steel grades selected according to the required standard.
- Black surface condition.
- Hot-dip galvanizing.
- Electro-galvanizing.
- Anti-rust oil treatment.
- Protective coating.
End processing
- Plain ends for general fabrication.
- Beveled ends for specified welding preparation.
- Threaded ends for applicable product requirements.
- Grooved ends for applicable connection arrangements.
Dimensions, steel grades, lengths, surface treatments and end-processing requirements are confirmed against the product specification and order quantity before production.
04. Manufacturing & Quality Control
Material specifications, dimensional accuracy and longitudinal weld quality are important considerations when purchasing ERW carbon steel hollow sections.
Our ERW carbon steel tube manufacturing process includes steel material preparation, profile forming, electric resistance welding and dimensional control.
Quality inspection covers the main product requirements:
- Material Verification: Checking material specifications, chemical composition and mechanical properties as applicable.
- Dimensional Inspection: Checking outside dimensions, wall thickness and dimensional tolerances against the order specification.
- Weld Quality Inspection: Assessing the longitudinal weld seam according to applicable inspection requirements.
- Mechanical Testing: Conducting relevant tests according to the specified product standard and order requirements.
- Product Identification: Maintaining product and inspection information for order verification.
Material Test Certificates and applicable inspection records can be provided according to order requirements.
05. Company & Supply Support
We are Shanxi Midas Industrial Co., Ltd., a steel products supplier established in 2012 in Shanxi, China.
Our product portfolio covers steel coils, steel sheets, steel strips, H-beams, steel pipes, pipe fittings, structural steel sections, steel bars and steel wires.
For carbon steel hollow section orders, we focus on confirming the profile, steel grade, dimensions, length, surface treatment and processing requirements before quotation and order placement.
We provide product consultation, specification confirmation, quotations, customized order arrangements, production and inspection progress communication, and after-sales support. Packaging and product identification are arranged according to shipment and order requirements.
06. FAQ & RFQ
What types of carbon steel hollow sections are available?
We supply round, square and rectangular hollow sections. The appropriate profile depends on the structural design, equipment configuration and fabrication requirements.
Which material standard do you offer?
ASTM A500/A500M is listed for our ERW carbon steel tube product range. Other material and dimensional requirements are subject to product and order confirmation.
Can I specify different steel grades and wall thicknesses?
Steel grades and wall thicknesses are selected according to the applicable material standard and order specification. Please include your required grade, standard and dimensions when requesting a quotation.
Can you supply fixed-length hollow sections?
Yes. Both random-length and fixed-length options are available. Please specify the required length in your inquiry.
What surface treatments and end-processing options can you provide?
Surface options include black finish, hot-dip galvanizing, electro-galvanizing, anti-rust oil and protective coatings. End-processing options include plain, beveled, threaded and grooved ends, subject to product applicability.
What information should I provide for a quotation?
Please send the profile type, dimensions, wall thickness, steel grade, applicable standard, required length, surface treatment, end-processing requirements and order quantity. Your destination port and product drawing can also be included if available.
Send us your specifications or product drawing. We will review your requirements and provide a quotation based on the requested product configuration and order quantity.
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