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Help CenterS235JR Hot Dip Galvanized Square Steel Tube SHS Heavy Duty Zinc Coating for Curtain Wall & Fence Post
Product Spotlights
- Multiple steel grades optional: Q235B, Q355B, S235JR. Stable mechanical property, excellent welding and bending performance.
- ERW welded forming. Straight tube body, smooth surface, uniform wall thickness and clean cut ends.
- Wide range of sizes in stock. Custom cutting service available .
- Factory direct supply, stable production capacity
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Product Overview
Hot dip galvanized square tube and rectangular tube, also known as SHS and RHS hollow section, are ERW electric resistance welded carbon steel hollow profiles. After hot-dip galvanizing treatment, the pipe surface forms a uniform zinc coating to achieve excellent anti-corrosion and rust-proof performance. Widely used in greenhouse, fence, steel structure frame, building engineering, support brackets and other construction projects. We are a professional steel manufacturer in China, with large ready stock, complete specifications and custom cutting service. Full material certificates can be supplied for overseas engineering projects.
Product Specification
| Item | Specification |
|---|---|
| Product Name | Hot Dip Galvanized Square Tube / Rectangular Tube, SHS & RHS Hollow Section |
| Material | Carbon Steel |
| Grades | Q235B, Q355B, S235JR, S355JR, ASTM A500 Grade B/C |
| Standard | GB/T6728, EN10210, ASTM A500 |
| Surface Treatment | Hot Dip Galvanized |
| Cross Section | Square / Rectangular Hollow |
| Manufacturing Process | ERW Electric Resistance Welded |
| Length | 6m, 9m, 12m or cut to custom length |
| Size Range | Complete sizes available, from small to large square & rectangular dimensions |
| Tolerance | Meet GB / EN / ASTM standard tolerance |
| Certificate | 3.1 Mill Test Certificate, SGS Test Report |
| MOQ | 1 Ton |
| Supply Capacity | 8000 Ton per month |
| Payment Term | TT, LC |
| Trade Term | FOB, CFR, CIF, DDP |
| Lead Time | 7–15 days for stock items |
| Packing | Bundled with steel strips |
| Availability | Ready Stock |
| Application | Greenhouse, fence, steel structure frame, building construction, support bracket |
Key Advantages
✅ Strong Anti-corrosion PerformanceHot dip galvanized zinc layer is tightly bonded with steel substrate, effectively resisting rust and corrosion for outdoor and humid environments, extending service life greatly.
✅ Full Size Range & Custom CuttingRich inventory of square and rectangular hollow section in various dimensions. We can cut tubes to your target length, reducing your on-site machining work and saving labor cost.
✅ Stable Mechanical PropertyAdopt high-quality carbon steel raw material. ERW welding technology ensures good straightness, flat surface and reliable weld seam, strong bearing capacity.
✅ Complete Documents & Strict InspectionEvery batch will be inspected before shipment. 3.1 mill test certificate and SGS report can be provided to satisfy third-party inspection requirements for international projects.
✅ Factory Direct Supply & Flexible Trade TermsNo middleman markup, competitive factory price. We support multiple trade terms FOB, CFR, CIF, DDP. TT and LC payment are acceptable.
Application Scenarios
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