Black Annealed Round Steel Tube
ERW Hollow Section · RHS / SHS
EN10219EN10210ASTM A500MOQ: 1 Ton
Diameter
Diameter(mm):12-114
Thickness
Thickness(mm):1.5-2.0
Length
Length(m):0.5-12,Cut as per request
Standard
Standard: ASTM A500, EN10219,EN10210, JIS, CSA, KS, AS/NZS
Surface Treatment: Annealed
Technical Specifications
| Product Name | Black Annealed Round Steel Tube |
| Standards | ASTM A500 GR. A/B/C, S235JR, S355JR, S355J0H, S355J2H,STKR400, STKR490 |
| Material | Q195, Q235B, Q355B, S235-S355 |
| Size Range | Diameter(mm):12-114 |
| Wall Thickness | 1.5-2.0mm |
| Length | 0.5-12,Cut as per request |
| Surface | Annealed |
| End Finish | Plain End / Beveled End |
| Packaging | Bare bundle / Woven bag / As required |
Product Description
YouXinFa square steel tubes are produced using advanced ERW technology. Starting from high-quality hot-rolled steel coils, each tube undergoes continuous roll forming, high-frequency welding, online sizing, straightening, and NDT inspection to ensure superior dimensional accuracy and weld integrity.
Our factory in Tianjin operates multiple production lines. Every batch is traceable and tested to meet international standards before shipment.
Why Choose Us
Direct Factory
Own production base. No middlemen.
Quality Assured
Full NDT inspection. ISO certified.
Export Ready
Seaworthy packing. Fast clearance.
Applications
- Steel structure buildings: columns, beams, trusses
- Machinery manufacturing: equipment frames, conveyor lines
- Automotive industry: chassis components, crash beams
- Agricultural facilities: greenhouse frames, fencing
- Infrastructure: guardrails, sign posts, solar panel mounts