SUS321: Stabilized Stainless and Welded Heat Service

SUS321 is a titanium-stabilized austenitic stainless grade. Material reference.

Stabilized Stainless and Welded Heat Service

For a welded part in elevated-temperature service, clarify why stabilization is specified and whether the design also needs creep or fatigue data. The alloy choice alone does not define the acceptable temperature or life of the assembly.

Manufacturing and acceptance checks

Supply the temperature cycle, mechanical load and full material specification. Ask for the intended welding and treatment route and identify the condition represented by any property data. Compare SUS347 only through a documented substitution review, preserving the original joining and service requirements.

Compare related options

• SUS347
• SUS304L

Reference and scope

Outokumpu: Core stainless grade range 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.