SUS347: Stabilized Grade Substitution

SUS347 is a niobium-stabilized austenitic stainless grade. Material reference.

Stabilized Grade Substitution

When a drawing allows a choice between stabilized grades, examine the product specification and joining requirements before accepting stock availability as the deciding factor. For a hot welded component, the relevant comparison includes service time and fabrication history, not simply room-temperature tensile strength.

Manufacturing and acceptance checks

Request the complete grade designation, mill certificate and weld procedure requirements. Define any high-temperature property evidence needed by the design. Agree dimensional inspection after joining and record whether a proposed SUS321 alternative has been accepted for the particular assembly and service condition.

Compare related options

• SUS321
• SUS310

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.