Steel Pipe
Square / Rectangle Steel Pipe
Square and rectangle steel pipe is supplied in both seamless and welded forms, with grades covering ASTM A500, A513, A36, and EN 10210/10219 families. This allows buyers who would otherwise source structural sections from separate mills or suppliers to consolidate their order for one project, one inspection, and one shipment. The availability of multiple standards and shapes on a single stock list reduces coordinatio
- Seamless and welded options available for square and rectangle sections, so the choice is driven by application, not supply chain fragmentation
- Multiple international standards on one stock list—ASTM, EN 10210, EN 10219—so mixed-standard projects stay on one order
- ASTM A500 Grade B, A513, A36, and EN S235, S355, S275 grades available for structural, mechanical and architectural use
- Round, square and rectangle sections from the same order, which keeps structural and fabrication scope with one supplier
Mill certificates issued against the ordered grade and standard. Third-party inspection available on request.
Overview
What This Material Is For
Square and rectangle steel pipe is supplied in both seamless and welded forms, with grades covering ASTM A500, A513, A36, and EN 10210/10219 families. This allows buyers who would otherwise source structural sections from separate mills or suppliers to consolidate their order for one project, one inspection, and one shipment. The availability of multiple standards and shapes on a single stock list reduces coordination effort and delivery complexity.
Key benefits
Why Buyers Choose It
- Seamless and welded options available for square and rectangle sections, so the choice is driven by application, not supply chain fragmentation
- Multiple international standards on one stock list—ASTM, EN 10210, EN 10219—so mixed-standard projects stay on one order
- ASTM A500 Grade B, A513, A36, and EN S235, S355, S275 grades available for structural, mechanical and architectural use
- Round, square and rectangle sections from the same order, which keeps structural and fabrication scope with one supplier
- Third-party inspection can be arranged before shipment, reducing post-arrival delays and rework
Application scenarios
Where It Is Used
- Structural framing in industrial buildings using ASTM A500 Grade B or EN S355J2H square tubing
- Mechanical components and frames in machinery using ASTM A513 (1020-1026) welded square and rectangle pipe
- Architectural and facade systems requiring EN 10219 S235JRH or S355J0H with consistent surface finish and dimensional control
- Industrial equipment frames and supports using ASTM A36 or EN S235JRH in welded square sections
- Load-bearing structures in offshore or onshore facilities where EN 10210 S355NH or S355J2H is required for low-temperature toughness
- Custom fabrication projects needing mixed-grade and mixed-standard tubing in one delivery
Buyer profile
Who It Is For
- EPC contractors sourcing structural steel for industrial plants or buildings with mixed-grade callouts
- Fabricators building machinery frames, conveyors or equipment that require A513 or A500 tubing
- Architectural firms specifying EN 10219 or EN 10210 tubing for façades or interior structures
- Equipment manufacturers sourcing square and rectangle pipe for load-bearing or mechanical components
- Procurement teams managing multi-standard projects that would otherwise split across multiple mills
Sourcing pain points
Problems It Solves
- Splitting one structural scope across multiple mills—e.g., one for seamless, one for welded, one for different standards—leading to multiple inspection dates and shipment schedules
- Inconsistent material grades or standards when one supplier cannot cover all required specifications
- Delays caused by waiting for a second mill to produce a size or grade not in stock
- Increased inspection and documentation burden when sourcing from multiple suppliers
- Mismatched surface finish or tolerance between welded and seamless sections in the same structure
Engineering detail
Technical Features
- Available in both seamless and welded construction, selected by strength, pressure, and cost requirements
- Grade coverage includes ASTM A500 Grade B, A513 (1020–1026), A36, and EN 10210/10219 S235, S355, S275, S235JRH, S355J2H, S355NH, S275J0H, S275J2H
- Surface finish and dimensional tolerance controlled to meet structural and mechanical application needs
- Welded pipe includes continuous welds with post-weld heat treatment where required for toughness
- Seamless pipe offers uniformity in wall thickness and mechanical properties along the full length
- Cut lengths and end preparation available to match fabrication requirements
Specifications
Grades Standards And Size Range
Values below come from the published product data. Anything not listed is confirmed per enquiry.
| ASTM A500 Grade B | Standard structural tubing for general construction and mechanical use |
|---|---|
| ASTM A513 (1020–1026) | Cold-formed welded steel tubing for mechanical and structural applications |
| ASTM A36 (A36) | Carbon structural steel for general fabrication and load-bearing applications |
| EN 10210:S235 | Non-alloy structural steel for hot-formed welded tubes |
| EN 10210:S355 | High-strength structural steel for heavy-duty applications |
| EN 10210:S235JRH | Structural steel with improved toughness at low temperatures |
| EN 10210:S355J2H | High-strength steel with good impact resistance at low temperatures |
| EN 10210:S355NH | Steel for high-temperature service and structural applications |
| EN 10219:S235 | Cold-formed welded tubes for structural use |
| EN 10219:S355 | High-strength cold-formed welded tubes |
| EN 10219:S275J0H | Cold-formed tubes with good impact strength at low temperatures |
| EN 10219:S275J2H | Cold-formed tubes with enhanced toughness for low-temperature service |
| EN 10219:S355J0H | High-strength cold-formed tubes with good low-temperature impact resistance |
| EN 10219:S355J2H | High-strength cold-formed tubes with high toughness at low temperatures |
| Type | Seamless and Welded |
| Shape | Square and Rectangle |
| Outside dimension range | TBC |
| Wall thickness range | TBC |
Material options
Materials
- Carbon steel for general structural and mechanical applications in ASTM A36, A500, and A513 families
- Low-alloy steel for higher strength and toughness in EN 10210 and EN 10219 S355 and S275 grades
- Steel with improved low-temperature toughness for service in cold climates, such as S355J2H and S355NH
- Cold-formed welded steel for precise dimensions and consistent wall thickness in mechanical components
- Seamless steel for uniformity and absence of weld lines in high-stress or high-integrity applications
How it is made
Manufacturing Route
01Raw material inspection and verification before processing
02Seamless: Billet heating and rotary piercing to form hollow shell, followed by hot rolling or cold drawing
03Welded: Steel strip forming into square or rectangle, continuous welding, and post-weld treatment
04Straightening, cutting to length, and end preparation to customer specification
05Surface treatment including galvanizing, painting, or coating if required
06Final inspection, marking, bundling, and preparation for shipment
Testing and release
Quality Control
- Chemical composition and mechanical property checks against the ordered standard
- In-house CNAS-certified laboratory performs routine testing and material verification
- Third-party inspection available on request and can be booked before shipment
- Mill certificates issued per the purchase order, including grade, standard, and test results
What can be changed
Customisation Options
- Grade and standard selected per line item, so one order can mix ASTM, EN 10210, and EN 10219 callouts
- Cut lengths, end preparation, and surface finish specified at order stage
- OEM service accepted for branded packaging or marking
- Packing and marking arranged to suit the destination port and inspection regime
Honest comparison
How It Compares With The Alternatives
| Welded pipe only | Seamless is preferred for high-stress or high-integrity applications where weld-line defects are unacceptable, but welded is more cost-effective for general structural use |
|---|---|
| Single-standard supplier | A single supplier covering multiple standards reduces coordination effort and delivery complexity compared to sourcing from separate mills |
| Local mill sourcing | Local mills may not carry all required grades or shapes; Jialu offers a consolidated stock list across ASTM and EN standards, reducing procurement risk |
How to specify it
Buying Guide
- Start with the project’s design standard—ASTM, EN 10210, or EN 10219—and select the grade family accordingly
- For low-temperature service, specify S355J2H, S355NH, or S235JRH to ensure toughness requirements are met
- For mechanical or load-bearing components, confirm whether A513 or A500 Grade B is required
- Send the size table and required standard with the enquiry, as availability varies by section and wall thickness
- Book third-party inspection at order stage to ensure production schedule accommodates it
Questions buyers ask
Questions About Square / Rectangle Steel Pipe
What grades of square and rectangle steel pipe do you supply?
ASTM A500 Grade B, A513 (1020–1026), A36, and EN 10210/10219 grades including S235, S355, S275, S235JRH, S355J2H, S355NH, S275J0H, S275J2H
Can you supply both seamless and welded sections?
Yes. Both seamless and welded square and rectangle steel pipe are available.
Can one order include multiple standards and grades?
Yes. Mixed-standard and mixed-grade orders are standard here—this is why buyers consolidate pipe, plate, and coil with us.
What certification supports the material?
The company holds ISO 9001, API Q1, PED, CE, API 5L, 5CT, 5DP, and an in-house CNAS-certified laboratory. Mill certificates are issued per order.
Can we appoint our own inspector?
Yes. Third-party inspection is available on request and is best booked at order stage to allow for production scheduling.
What payment terms and currencies do you accept?
L/C, T/T, PayPal, and credit card, in USD, CAD, AUD, SGD, EUR, or RMB.
Related products
Others Buy These On The Same Order
Where this material is used
Industries Solutions And Guides
Get Square / Rectangle Steel Pipe Quoted
Send the grade, size and quantity. Availability, price and lead time come back per line item.