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square tube
Hollow structural section square tube. ASTM A500. For frames, racks, and railings. Browse the full product list below. ASTM A500 Gr.B/C. For structural and architectural use.Square steel tube from Junnan Steel

Square steel tube Product Range at a Glance

Standard Square Tube
1.Grade: Q195~Q345
2.Size: SHS 16x16~250x250; RHS 10x20~120x80
Round carbon steel tube used for construction site,building
1.Grade: Q195~Q345
2.Size: SHS 16x16~250x250; RHS 10x20~120x80
1.Grade: Q195~Q345
2.Size: SHS 16x16~250x250; RHS 10x20~120x80
2.Size: SHS 16x16~250x250; RHS 10x20~120x80
1.Grade: Q195~Q345
2.Size: SHS 16x16~250x250; RHS 10x20~120x80
QC includes chemical analysis, hydrostatic testing, dimensional checks, and surface inspection. Our square steel tube serves industries worldwide. Building frames, mezzanine supports. Pallet rack uprights, shelving frames. Railings, balustrades, gates, furniture. Founded 2015, exported to 118+ countries. Mill pricing, no middlemen. SGS, BV, CIQ accepted. 15-25 days. FOB, CIF, CFR. Multi-language. 24h response. Yes, building frames, mezzanine supports. Yes, pallet rack uprights, shelving frames. Yes, railings, balustrades, gates, furniture.
Square steel tube Specifications
Square steel tube Applications

Steel Frames

Racking

Architectural
Why Junnan Steel
10+ Years Export
Factory-Direct
Third-Party Inspection
Flexible Shipping
Global Support
FAQ
Steel Frames?
Racking?
Architectural?

We will get you a fast free quote and schedule your job on the day and time that works best for you.







