Weld Support Parts Blog

Tag: 347 stainless

  • ER347 TIG / GTAW Filler Metal: Filler Metal Finder Notes

    ER347 TIG / GTAW Filler Metal: Filler Metal Finder Notes

    ER347 TIG / GTAW Filler Metal

    ER347 TIG / GTAW filler metal is a stabilized stainless filler used in TIG welding support conversations for 321 and 347 stainless applications. Treat the filler metal listing as a selection starting point, not as procedure approval. Before ordering rod or starting a weld, verify the WPS, code requirements, base metal grade, service conditions, and the manufacturer data sheet.

    The most useful approach is simple: confirm the joint details first, then confirm the filler choice. If the base metal, service temperature, or corrosion environment is not fully known, do not assume ER347 is the correct answer. Use the product page and the filler metal finder page to narrow the selection, then validate against the actual job requirements.

    Key Takeaways

    • ER347 is a stabilized stainless filler metal used with TIG / GTAW processes.
    • The listed application focus is 321 and 347 stabilized stainless, but final selection depends on the WPS and base metal.
    • Do not treat the filler metal page as a procedure approval. It is a starting point only.
    • Verify weld joint requirements, corrosion exposure, and post-weld service conditions before use.
    • If any technical detail is uncertain, mark it Unknown (Verify) and check the data sheet.

    What ER347 TIG / GTAW Filler Metal Is Used For

    ER347 is commonly considered when the job involves stabilized stainless steel and TIG / GTAW welding. Stabilized stainless filler selection matters because the filler must match the weld metal performance expected by the design, the governing code, and the service environment. That means the base metal grade and service conditions are part of the selection process, not just the alloy number on the spool or tube.

    On the Weld Support Parts filler metal page, the listing should be read as a support reference. It can help a buyer or welder start the search, but it does not replace the procedure specification. If the WPS calls for a different filler metal, follow the WPS.

    Check / Inspect / Verify Before Welding

    • Check the WPS for the specified filler classification. If the WPS is missing or unclear, stop and verify it before setup.
    • Inspect the base metal stamping, mill certs, or job documentation to confirm whether the material is 321, 347, or another stainless grade.
    • Verify the service environment. Heat, corrosion exposure, and process contamination can change the filler choice.
    • Check the wire size or rod diameter required by the job. Common sizes may be listed on the product page, but if a size is not confirmed there, mark it Unknown (Verify).
    • Inspect storage and handling conditions. Stainless filler should be kept clean and protected from contamination.
    • Verify the manufacturer data sheet for AWS classification, recommended use, and any limitations.

    Troubleshooting Support Notes

    If the filler classification does not match the WPS: stop and confirm whether the job allows an alternate filler. Do not substitute based on appearance or assumption.

    If the base metal grade is uncertain: do not guess between 321, 347, or another stainless grade. Check drawings, PMI results, material certs, or customer documentation.

    If weld quality changes during the job: inspect preparation, shielding gas coverage, cleanliness, and heat input control. ER347 cannot correct process problems caused by contamination or poor setup.

    If the service condition is high-temperature or corrosive: verify whether stabilized stainless filler is required and whether the governing procedure has additional restrictions. When in doubt, mark the service condition Unknown (Verify) until confirmed by engineering or the WPS.

    Filler Metal Finder Section

    Use the Weld Support Parts filler metal finder as a selection aid when you are narrowing down stainless TIG filler options. It is a starting point for product identification, not a guarantee of procedure approval.

    Open the filler metal finder

    The finder is useful when you know the process is TIG / GTAW and you are comparing classifications for stainless work. It should still be checked against the actual WPS, code, and base metal. If the job requires a different filler metal, the finder result does not override the procedure.

    Product Page Support Notes

    For the ER347 TIG / GTAW filler metal listing itself, use the product page as the primary reference on the store side and compare it with the filler metal finder result. If a detail is not clearly shown, treat it as Unknown (Verify) rather than filling in the gap from memory.

    View ER347 TIG / GTAW filler metal

    Before purchase, verify the following:

    • AWS classification listed on the product page and data sheet.
    • Actual rod or filler size needed for the job. If not shown, Unknown (Verify).
    • Whether the application is for 321 or 347 stainless, or another approved use under the WPS.
    • Any code, customer, or plant restrictions on filler selection.

    Safety Notes

    • Do not weld stainless without confirming the correct filler and shielding plan for the job.
    • Keep filler metal clean. Surface contamination can cause weld defects and corrosion issues.
    • Follow site safety rules for heat, arc flash, fume exposure, and hot work permits.
    • If the job involves unknown alloy identity, stop and verify before proceeding.
    • When technical data is not confirmed by the product page or data sheet, use Unknown (Verify).

    FAQ

    Is ER347 TIG / GTAW filler metal automatically correct for 321 stainless?
    No. It may be used in stabilized stainless applications, but the WPS and base metal confirmation control the final selection.

    Can I use the filler metal finder as a welding approval tool?
    No. The finder is a selection starting point only. Verify the procedure, code requirements, and manufacturer data sheet before welding.

    What should I do if the base metal grade is not confirmed?
    Stop and verify the material grade through documentation, PMI, or engineering review. Do not assume the alloy.

    What if the product page does not show a detail I need?
    Treat it as Unknown (Verify) and check the data sheet or contact the responsible welding support team before ordering.

    Sources Checked

    Selection reminder: ER347 TIG / GTAW filler metal should be selected from verified job data, not from assumption. Confirm the WPS, code requirements, base metal grade, service conditions, and manufacturer data sheet before ordering or welding.

    Disclosure: As an Amazon Associate, Weld Support Parts may earn from qualifying purchases.

  • ER347 MIG / GMAW Filler Metal: Filler Metal Finder Notes

    ER347 MIG / GMAW Filler Metal: Filler Metal Finder Notes

    ER347 MIG / GMAW Filler Metal

    ER347 MIG / GMAW filler metal is a common starting point for austenitic stainless work where the base metal is 321 or 347 stabilized stainless. The key point is simple: do not treat the filler label as a final approval. Confirm the WPS, code requirements, base metal grade, service conditions, and manufacturer data sheet before ordering wire or striking an arc.

    On the Weld Support Parts filler metal page, ER347 is presented as a selection starting point, not a guarantee of procedure acceptance. That matters on stainless jobs because base metal mix-ups, wrong service conditions, and unverified heat input targets can create repair delays or rejection during inspection.

    Key Takeaways

    • ER347 is a niobium-stabilized stainless filler metal used for 321 and 347 stainless applications.
    • Use the filler metal page to narrow the search, then verify against the WPS and the manufacturer data sheet.
    • Do not assume ER347 is interchangeable with other stainless wires such as ER308L. Verify the applicable procedure first.
    • Wire diameter options listed on the source page include .030 in, .035 in, and .045 in. Confirm the exact size you need on the purchase page and against the wire feed setup. Unknown (Verify) if a specific diameter is acceptable for your procedure.
    • For stainless service, verify corrosion exposure, temperature range, and any code or customer restrictions before use.

    Selection and Support Checks

    If you are supporting a job package or buying for a maintenance crew, use this sequence.

    1. Check the WPS. Confirm the process is MIG / GMAW and the filler classification is allowed. If the WPS is not available, stop and verify with welding engineering or the responsible supervisor.
    2. Inspect the base metal stamp or mill cert. Verify whether the part is 321 or 347 stainless, or another grade. Unknown (Verify) if the material ID is unclear.
    3. Verify service conditions. Stainless filler selection can depend on heat exposure, corrosion environment, and post-weld requirements. Do not assume the wire is correct for all service.
    4. Match wire size to feed equipment. Check drive rolls, liner condition, gun setup, and contact tip size. A poor feed setup can look like a filler problem when it is actually a delivery problem.
    5. Confirm shielding gas and parameters. Use the gas and settings called out by the WPS or the manufacturer data sheet. Unknown (Verify) if your shop standard has not been approved for this job.

    Troubleshooting and Support

    When ER347 wire is being considered for a job and the setup is not performing as expected, work through the problem before changing materials.

    Issue: Wire feeding is erratic

    • Check the liner for wear or contamination.
    • Inspect drive roll tension and groove type.
    • Verify the contact tip is sized for the wire diameter.
    • Confirm the spool is not damaged or contaminated.

    If feed problems continue, review the torch lead length and any tight bends that may be increasing drag. Unknown (Verify) if the issue is electrical, mechanical, or a combination until the feed path is inspected.

    Issue: Bead appearance or wetting is inconsistent

    • Verify the shielding gas and flow rate against the WPS.
    • Check for drafts, nozzle contamination, or spatter buildup.
    • Inspect work lead placement and connection quality.
    • Review travel speed and stickout against the approved procedure.

    Do not change filler metal first. Verify process settings and gas coverage before replacing wire.

    Issue: Material designation is uncertain

    • Inspect tags, stamps, drawings, and mill paperwork.
    • Check whether the job is 321, 347, or another stainless grade.
    • Verify whether the customer or code basis allows ER347.
    • If uncertain, hold the job and request written clarification.

    Unknown (Verify) is the correct status whenever the base metal grade or service requirement cannot be proven from the paperwork and the part itself.

    Filler Metal Finder Notes

    The Weld Support Parts filler metal finder page is useful as a selection starting point. Use it to narrow the search by process and classification, then validate the result against the WPS and the manufacturer data sheet. It is not a procedure approval tool.

    The ER347 page at ER347 MIG / GMAW Filler Metal gives the basic classification and application note for 321 and 347 stabilized stainless. Treat that page as a reference point for procurement and job support. Do not assume it covers every code, every position, or every service condition.

    What Buyers and Supervisors Should Verify Before Ordering

    • Classification on the WPS: ER347, or another approved filler, Unknown (Verify) if not documented.
    • Base metal grade: 321 or 347 stainless, or another stainless grade if the drawing calls for it.
    • Wire diameter: .030 in, .035 in, .045 in, or another size if required by the procedure.
    • Shielding gas and transfer mode: verify from the approved welding document.
    • Packaging and storage needs: confirm dry storage and handling requirements with the supplier data sheet.

    For maintenance buyers, the practical risk is simple: a stainless wire can be physically in stock and still be the wrong choice for the job. Confirm the paperwork first, then buy to match the verified requirement.

    Safety Notes

    • Follow the site hot work permit process before welding.
    • Use the approved PPE for stainless welding, including eye, face, hand, and body protection.
    • Provide adequate ventilation and fume control.
    • Do not weld on unidentified material until it is verified.
    • Keep wire, gun, and gas equipment in safe condition before use.

    Stainless welding can generate fumes and heat exposure risks. Review the manufacturer safety data and the shop safety rules before use.

    FAQ

    Is ER347 the same as ER308L?
    No. They are different filler classifications. Do not substitute without checking the WPS and the approved procedure. Unknown (Verify) if a substitution is allowed.

    Can ER347 be used on any stainless steel part?
    No. The source material identifies it for 321 and 347 stabilized stainless applications. Verify the base metal grade and service condition before use.

    Should I use the filler metal page as proof of approval?
    No. The filler metal page is a starting point for selection. Final approval comes from the WPS, customer requirements, code basis, and manufacturer data.

    What wire sizes are listed on the source page?
    The source keywords include .030 in, .035 in, and .045 in. Verify the exact size against the job requirements and the product listing before ordering.

    Sources Checked

    Disclosure: As an Amazon Associate, Weld Support Parts may earn from qualifying purchases.

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