Leading Seamless Square Tubing Manufacturers in China
Seamless Square Tubing is a hollow, square-shaped stainless steel product crafted without welds, offering superior strength, uniformity, and corrosion resistance. Typically made from alloys like 304, 316, or duplex stainless steel, it features a smooth, continuous surface ideal for high-pressure and corrosive environments. Produced through processes like extrusion or piercing, seamless square tubing ensures structural integrity and precision. Its versatile design suits applications in construction, architecture, automotive, and industrial systems, where aesthetic appeal, durability, and performance are essential.
Specifications for Seamless Square Tubing
| Category | Details |
|---|---|
| Characteristics | Seamless, square stainless steel (304/316/duplex); high Cr (18-28%), Ni (8-22%); strong, uniform, durable. |
| Surface Treatment | Mill finish (annealed/pickled); optional polished (240-600 grit), brushed, passivated, or coated. |
| Dimensions and Specs | OD: ½” x ½”–12” x 12”; Thickness: 0.065”–0.500”; Length: 6m or custom; ASTM A511, A312, A554. |
| Corrosion Resistance | 304: Good in mild settings; 316: Strong vs. chlorides; Duplex: Best vs. pitting/SCC (PREN 30-40+). |
| Mechanical Properties | Yield: 170-550 MPa; Tensile: 485-800 MPa; Elongation: 25-35%; Hardness: ≤92 HRB (304/316), ≤32 HRC (duplex). |
| Processability | Good formability/weldability (304/316); duplex tougher; seamless via extrusion/piercing for precision. |
| Applications | Construction frameworks, architectural decor, industrial frames, automotive/marine, energy supports. |
| Standards | ASTM A511, A312, A213; ASME SA312; UNS S30400/S31600/S31803; EN 1.4301/1.4404/1.4462; NACE MR0175. |
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Choose the Seamless Square Tubing You Can Trust
Enhance your projects with Seamless Square Tubing! Offering unmatched strength and corrosion resistance, it’s perfect for construction, architecture, and industrial applications. Contact us today to customize your ASTM A511-compliant tubing—build with precision and durability now!
