What are the features of SS 446 seamless pipe

What are the features of SS 446 seamless pipe

Overview

Stainless Steel 446 is a ferritic, heat‑resistant alloy commonly used to manufacture seamless pipes for demanding high‑temperature and corrosive environments. Produced from solid billets that are heated and formed without welding, SS 446 seamless pipes deliver uniform wall thickness, excellent dimensional accuracy, and long service life.

What is SS 446

SS 446 is a chromium‑rich ferritic stainless steel designed for elevated‑temperature service and oxidation resistance. It is manufactured into seamless pipe by hot forming processes that produce a hollow, weld‑free tube. Typical seamless sizes range broadly and are offered to match industrial dimensional standards.

Typical applications

  • High‑temperature process lines in chemical and petrochemical plants
  • Oil and gas piping and components
  • Heat exchangers, furnace parts, and boiler components
  • Air and hydraulic cylinders and bearings
  • Pulp and paper industry process lines
  • Any application requiring resistance to oxidation and reducing atmospheres

Key features and benefits

  • Excellent resistance to oxidation at elevated temperatures
  • Strong performance against reducing gases and many corrosive chemicals
  • Good resistance to ash and molten metals such as copper, lead, and tin
  • Stable microstructure that reduces risk of intergranular corrosion in service
  • High thermal stability with favorable thermal conductivity and controlled thermal expansion
  • Robust mechanical strength with good pressure‑bearing capability
  • Available in multiple shapes and forms, including round seamless tubes, square and rectangular sections, and custom geometries

Sizes, fabrication and finishing

  • Available across a wide OD range to meet standard and custom requirements
  • Produced using technologies such as controlled processing and extrusion to ensure consistent wall thickness and finish
  • Supplied with standard end preparations and protective end caps where required
  • Compatible with common forming operations and finishing treatments tailored to application needs

Machining and thermal characteristics

  • Machinable with best results at moderate to slow cutting speeds to avoid excessive work‑hardening
  • Exhibits a favorable coefficient of thermal expansion and good thermal conductivity, making it suitable for cyclic and continuous high‑temperature service

Selection guidance

Choose SS 446 seamless pipe when the application demands sustained oxidation resistance, stability in reducing atmospheres, and reliable high‑temperature mechanical performance. For environments dominated by chlorides or specialized chemical attack, consult material specialists for alternative alloys or protective measures.