Carbon Square Rod
We supply steel square bars in a range of dimensions and material grades, designed for structural frameworks, fabrication, and precision machining applications. Manufactured through hot rolling or cold drawing processes, these bars provide consistent cross‑sectional accuracy, straightness, and surface quality, ensuring reliable performance in both industrial and construction uses.
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  • High Dimensional Stability: Tight tolerances on width and straightness for accurate assembly and machining

  • Excellent Weldability & Machinability: Compatible with common welding methods and suitable for turning, milling, and drilling

  • Material Versatility: Available in carbon steel (Q235, S235JR, etc.), alloy steel (4140, 4340, etc.), and stainless steel (304, 316, etc.) grades

  • Surface Finish Options: Supplied as‑rolled, black, bright, or with protective coatings as required

Ideal for machinery frames, support structures, tooling components, architectural details, and custom fabrications. We offer precision cutting, chamfering, surface treatment, and full material certification to meet ASTM, EN, JIS, and GB standards.


Product Namecarbon Steel Square Bar
Material GradeSPCC, Q195, Q215, Q235, Q345   SS400, DIN, ASTM G500 GR A, GB/T3524-2005, etc.
2205,2507,2906,330,660,630,631,17-4ph,17-7ph,S318039,904L.etc
SpecificationsRound barDiameter:3mm~800mm
Angle barSize:3mm*20mm*20mm~12mm*100mm*100mm
Square barSize:4mm*4mm~100mm*100mm
Flat barTickness:2mm~100mm
Width:10mm~500mm
HexagonalSize:2mm~10mm
Lead TimeStock or 3--10 days or according to quantity
Trade TermTelegraphic Transfer,T/T,Letter of Credit,L/C

详情标题1-产品详情 拷贝


Made from premium carbon and alloy steel, our steel bars offer excellent tensile strength, toughness, and machinability. Covering grades like 4140, A36, S45C, they’re ideal for machinery shafts, automotive parts, construction fasteners, and tool components. Available in common diameters with surface options (turned, polished, black), each batch includes MTC, complying with ASTM, DIN, GB standards.


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Manufactured using precision hot-rolling and cold-drawing processes, our fully automated production line incorporates straightening machines and real-time dimension monitoring to ensure ±0.1mm side tolerance and straightness within ≤0.2mm/m. The system is designed to reliably support both standard specifications and custom small-batch production requirements.


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详情标题3-产品检测 拷贝


In order to ensure product quality, we will arrange professional personnel to check product quality, packaging, weight, hardness, etc., according to customer requirements of product specifications, looking for high-quality and cheap cooperative factories in China, to provide customers with one-stop procurement services and quality assurance.


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详情标题4-包装运输 拷贝


Excellent packaging: waterproof paper and plastic film + iron cover + at least three strapping straps + strapping straps fixed on iron or wood pallets can effectively protect products from corrosion and various climate changes during transportation. Generally speaking, we ship from Shanghai, Tianjin, Qingdao and Ningbo ports. We have worked with many experienced shipping companies for a long time to find the most suitable mode of transportation for you.


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