321 Stainless Steel Round Pipe or Tube

321 Stainless Steel Round Pipe/Tube   321 Stainless Steel Round Pipe/Tube (UNS S32100 / DIN 1.4541) is a titanium-stabilized austenitic alloy that adds ≥ 5 × (C + N) titanium to the classic 18-8 base. The titanium tie-up prevents chromium-carbide precipitation during welding or service between 427 °C and 816 °C, giving the pipe long-term immunity to intergranular corrosion without post-weld anneal. We manufacture seamless and welded tubes from 6 mm to 914 mm O.D. and 0.5 mm to 25 mm wall in mill lengths up to 12 m, with finishes 2B, BA, 180-600 grit polish, mirror 8K or electropolished (Ra ≤ 0.38 µm) for ultra-clean duties. All material is dual-certified 321/321H, 100 % eddy-current or hydro-tested, and supplied with EN 10204 3.1/3.2 certificates.     Standards: ASTM, GB, DIN, BS, EN, JIS Categories: Stainless Steel Pipe/Tube Outer Diameter: Seamless: 6mm-630mm / Welded: 9.5mm-1200mm Wall Thickness: Seamless: 2.0mm-30mm / Welded: 1.5mm-20mm Length: 1m-6m or according to customer's…