Duplex 2205: Welded Parts and Corrosion Review

2205 is a duplex stainless-steel designation. Material reference.

Welded Parts and Corrosion Review

For a welded part, compare the corrosion environment and fabrication route with those of an austenitic alternative. Do not approve a substitution to 316 solely from a room-temperature strength comparison. Confirm the exact UNS designation and product specification offered under the commercial 2205 label.

Manufacturing and acceptance checks

Provide chloride exposure, temperature, geometry and welding details. Agree procedure qualification and any required phase-balance, corrosion or impact testing. Define the condition of the surface after fabrication, including cleaning and removal of heat tint, and retain traceability from mill heat through welding and final inspection.

Compare related options

• Duplex 2507
• SUS316L

Reference and scope

Nippon Steel: duplex stainless steel product guide provides material or specification background. The checks above are purchasing guidance; final acceptance values must come from the agreed grade, product specification and condition.

Send a drawing and material requirements for review. Include quantity, critical dimensions and the inspection evidence required with delivery.