Description
Factory-Direct ASTM A500 GR.B Square Steel Tube Pricing — 3 production lines running simultaneously in Jinan deliver bulk SHS orders without broker markups, with original mill certificates on every heat.
Technical Specifications
| Parameter | Value |
|---|---|
| Designation | ASTM A500 GR.B Square Steel Tube |
| Product Type | Square Steel Hollow Section (SHS) |
| Steel Grade | Gr.B, S235, S275, S355, STK400 |
| Standard | ASTM A500, ASTM A53, GB/T 3091 |
| Section Shape | Square |
| Size Range | 19mm × 19mm – 800mm × 800mm |
| Wall Thickness | 1 – 30 mm |
| Length | 5.8m / 6m / 11.8m / 12m / Random Length |
| Technique | Welded (ERW) / Seamless |
| Surface Treatment | Black Painting / Galvanized / Varnish / Bare |
| Tolerance | ±1% |
| Ends | Plain |
| Application | Construction structures / Building frames / Curtain walls / Support tubes / Structural frames / Fertilizer tubes |
| MOQ | 5 Tons |
| Origin | Shandong, China |
Application Suitability
| Industry | Typical Applications |
|---|---|
| Commercial Construction | Steel structure frames for warehouses, retail centers, and multi-story office buildings |
| Industrial Facilities | Support tubes for conveyor systems, mezzanine platforms, and equipment bases |
| Façade Engineering | Curtain wall support grids and mullion framing |
| Infrastructure Projects | Bridge approach structures, sound barrier frames, and utility support columns |
| Agricultural Structures | Greenhouse skeletons and grain storage building frames |
What Negative Tolerance Really Costs on an ASTM A500 GR.B Square Steel Tube Order
A wall running 12 percent under spec turns a container into a customs rejection and a re-shipment bill.
I still carry a Middle East job in my head — 200×200 SHS bound for a contractor who trusted the supplier’s weight sheet without calling for an independent check. The SGS inspector at destination port pulled random cuts, found the wall consistently light, and flagged the entire container. We absorbed the full re-shipment loss. Since then, I personally cross-check every mill test certificate against the loading plan before anything rolls out of Jinan. Fragmented sourcing from multiple traders makes this kind of traceability gap almost inevitable — one supplier ships pipes, another ships plates, nobody owns the full material chain. [NEED_CITE: EN 10219 cold-formed hollow section dimensional tolerance requirements]
Matching Section Geometry to Structural Frame Loads
ASTM A500 GR.B square steel tube in sizes from 19×19mm up to 800×800mm covers everything from light-gauge purlin framing to heavy column sections. The equal-leg square profile distributes bending stress uniformly across all four faces, which makes it the default choice for moment-resisting frames where load direction shifts during seismic or wind events. ERW welded versions handle standard structural work at lower cost, while seamless options serve higher-pressure or critical-load zones where weld-line integrity matters. Our 2,800+ specification inventory means a project buyer can pull columns, beams, and bracing tubes from one heat batch rather than coordinating three separate suppliers.
Engineering Compliance and Surface Protection Choices
Structural frames designed to AISC or EN 1993 require documented yield strength and traceable heat numbers — not just a stamped label. ASTM A500 GR.B conforms to North American building codes, while S355 and S275 satisfy European EN 10219 requirements; STK400 covers Japanese JIS-spec projects. For outdoor or high-humidity environments, galvanized surface treatment extends service life without field painting, while black painted or varnished finishes work for interior or temporary structures. Every batch ships with mill test certificates showing chemical composition and mechanical properties per the ordered standard, and third-party SGS or BV inspection is available before container sealing. [NEED_CITE: steel grade equivalence between ASTM A500 and EN 10210 standards]
Reading the Steel Grade and Process Differences
Gr.B sits at the lower end of the ASTM A500 family but delivers adequate strength for most general construction framing at competitive pricing. Moving to S275 or S355 increases yield capacity for heavier spans without upsizing the section — useful when architectural constraints limit column dimensions. STK400 serves the Japanese market where JIS G3466 governs structural carbon steel tubes. ERW welded manufacturing forms the tube from coiled strip and welds the seam longitudinally, offering tight dimensional control and lower cost for standard sizes; seamless production extrudes from solid billet, eliminating the weld line entirely for applications demanding higher integrity. Wall thickness from 1mm to 30mm with ±1% tolerance means the theoretical weight on your drawing matches what arrives on site — a detail that matters when structural engineers calculate dead loads.
The Hidden Price of Unverified Material
Ordering ASTM A500 GR.B square steel tube from a broker who cannot produce original mill certificates creates downstream risk at every stage. Customs authorities in the EU and Middle East increasingly demand EN 10210 or EN 10219 compliance documentation; missing paperwork means containers sit at port accruing demurrage. On site, if the actual wall thickness falls below the ±1% tolerance band, structural connections designed for specific section properties fail fit-up, forcing field rework and schedule delays. Material without heat-number traceability cannot pass third-party inspection, which means the entire batch may need replacement at the supplier’s cost — or yours. [NEED_CITE: structural steel procurement documentation requirements for international projects]
Why Bulk Buyers Source ASTM A500 GR.B Square Steel Tube from Jinan
Factory-direct pricing means no trading company margin sits between your purchase order and our 3 production lines. We hold ready stock across 2,800+ specifications, so standard sizes ship within days while custom orders complete in typical production lead times. Every heat carries original mill test certificates, and our in-house lab runs three-stage inspection before any container leaves the yard. ISO 9001:2015 certification, Lloyd’s CE marking for EN 10210/10219, and FPC factory production control documentation clear customs in regulated markets. Flexible MOQ starts at 5 tons for trial orders and scales to full-container bulk, with split shipment options for phased projects. Our export team handles container loading optimization — critical when mixing 6-meter and 12-meter lengths to maximize payload — plus complete documentation packages for FOB, CIF, or DDP terms. [NEED_CITE: container loading optimization for heavy steel products]
Documentation & Compliance
- Mill test certificate documenting Gr.B chemical composition and mechanical properties per ASTM A500 for every heat lot
- CE certificate covering EN 10210 hot-finished and EN 10219 cold-formed hollow sections for European market customs clearance
- ISO 9001:2015 quality management certificate validating production process controls at Jinan facility
- SGS or BV third-party inspection report available on request, covering dimensional checks, surface quality, and witness testing
- Full material traceability by heat number from billet or coil input through final bundling
- Export documentation package including packing list, bill of lading, and certificate of origin for destination customs
Packaging, Loading & Delivery
- Black painted and bare ASTM A500 GR.B square steel tube bundled with steel strips and edge protectors to prevent surface damage during ocean transit
- Galvanized SHS sections wrapped with waterproof paper and secured in seaworthy bundles to preserve zinc coating integrity
- Mixed-length loading plans combining 6-meter and 12-meter pieces to maximize container payload and reduce per-ton freight cost
- Plain-end tubes cut to random or fixed length per order, with bundle tags showing heat number, steel grade Gr.B, and size dimensions
- FOB Jinan or Qingdao port with CIF and DDP options available; professional export team manages customs declaration and booking
Getting Your ASTM A500 GR.B Square Steel Tube Quote Moving
Send your specification list — section size, wall thickness, length, steel grade, quantity, and destination port — and receive a bulk quote with volume pricing and delivery timeline within 12 hours. Request original mill test certificates or third-party inspection confirmation before committing to production. Our account team confirms container loading plans and documentation requirements so your shipment clears customs without delays.
Frequently Asked Questions
Q: Can you supply ASTM A500 GR.B square steel tube in both ERW welded and seamless versions?
A: Yes, both ERW welded and seamless manufacturing processes are available. ERW welded covers standard structural applications at competitive pricing, while seamless serves higher-integrity requirements where weld-line elimination matters.
Q: What surface treatment options exist for ASTM A500 GR.B square steel tube?
A: Four options are available — black painted for interior or temporary use, galvanized for outdoor corrosion protection, varnished for light protection, and bare for projects requiring field coating or welding without surface prep.
Q: Do you provide mill test certificates with every shipment?
A: Original mill test certificates documenting chemical composition and mechanical properties per ASTM A500 ship with every batch. Third-party SGS or BV inspection reports are available on request for projects requiring independent verification.
Q: What is the minimum order quantity for ASTM A500 GR.B square steel tube?
A: The standard MOQ is 5 tons. Trial orders below this threshold are negotiable for new customers evaluating material quality before committing to bulk procurement.
Q: Can you handle mixed-size container loading for a single project?
A: Yes, our export team optimizes container loading plans combining multiple section sizes and lengths — such as mixing 19×19mm bracing tubes with 400×400mm columns — to maximize payload and reduce freight cost per ton.
Secure Your ASTM A500 GR.B Square Steel Tube Supply Today
Submit your specification sheet and destination port to receive factory-direct pricing with original mill test certificates within 12 hours.
Shandong Xin Jiyuan Special Steel Tube Co., Ltd
Tel: +86 531 8573 6315
Mobile/WhatsApp/WeChat: +86 188 5315 7756
Email: admin@sdxinjiyuan.com
Address: No.11889, Jingshi West Road, Lulian Group, Jinan City, Shandong Province, China
