Quick answer: W.Nr. 2.4668, UNS N07718 and Inconel 718 refer to the same general nickel-alloy grade family, but they are not complete purchasing specifications. An Inconel 718 strip RFQ should also state the governing ASTM, AMS or project document, revision, product form, thickness, width, coil or cut-length requirements, edge, condition, surface, inspection and certification.
Searches for “W.Nr. 2.4668,” “UNS N07718” and “Inconel 718 strip” often lead to the same material, but each term serves a different purpose. The grade identifier tells a supplier which alloy family is intended; the product specification tells both parties how the material is to be produced, tested and accepted. Buyers can first review the Inconel 718 nickel alloy strip product page, then use the guide below to prepare a complete enquiry.
Inconel 718 Strip Identifiers at a Glance
| Identifier | What it communicates | What it does not define | RFQ use |
|---|---|---|---|
| Inconel 718 | Widely used trade-name description for Alloy 718 | Standard, revision, thickness tolerance, condition or inspection | Use with a recognized designation and governing document |
| UNS N07718 | Unified Numbering System designation for the grade chemistry family | Product form, dimensional tolerances and delivery condition | Useful neutral material identifier in international enquiries |
| W.Nr. 2.4668 | European material-number reference associated with Alloy 718 | A complete EN, ASTM or AMS acceptance route | Add when drawings or purchasing systems use Werkstoff numbers |
| NiCr19Fe19Nb5Mo3 | A composition-style designation used in European contexts | Exact ordered condition and test requirements | Use only when it matches the governing project document |
Why “UNS N07718 Strip” Is Not a Complete Order
UNS N07718 identifies the alloy family, not every detail needed to manufacture or inspect strip. Two enquiries can name the same UNS grade yet require different melting routes, solution-treatment conditions, thickness tolerances, edge preparations, test directions or reporting. The buyer should therefore pair the identifier with the applicable specification and revision.
Product form is equally important. “Strip,” “sheet,” “foil” and “plate” can be separated by specification-defined dimensions and supply format. A coiled narrow product with slit edges may require different flatness, camber, edge and packaging controls from a cut sheet. Do not let the grade name silently select these requirements.
ASTM B670 vs AMS 5596 for Alloy 718 Flat Products
ASTM B670 and AMS 5596 can both be encountered for Alloy 718 flat products, but they are not interchangeable labels. Their full requirements, current revisions and purchaser options must be reviewed against the drawing and end use.
| Document | Published scope summary | Condition emphasis | Buyer should confirm |
|---|---|---|---|
| ASTM B670-25 | Rolled UNS N07718 plate, sheet and strip for high-temperature service | Material supplied in the annealed condition; the standard addresses properties after precipitation hardening | Edition, dimensions, supplementary tests and who performs final aging |
| AMS 5596N | Nickel-alloy sheet, strip, foil and plate, 25.4 mm (1.00 in.) and under in thickness | Solution heat treated, with aerospace-material controls defined by the specification | Exact revision, product thickness, melting route and drawing requirements |
| AMS 5914C | Precision cold-rolled Alloy 718SPF sheet/strip and foil in a limited thin-gauge range | Solution heat treated for the specified SPF product route | Whether the design actually requires the SPF grade and precision route |
| Project or drawing specification | Customer-controlled requirements additional to or replacing a general material standard | As stated on the approved document | Precedence, revision and all supplementary acceptance criteria |
Standards change. The revision shown here reflects the issuing organizations' current listings at the time of writing; purchase orders should state the project-approved revision.
Alloy Identity: Core Chemistry Check
Chemistry is one part of grade verification. The selected standard supplies the complete limits and test rules; the abbreviated table below is only a practical identification check based on manufacturer technical data.
| Element | Typical published range, wt.% | Purchasing relevance |
|---|---|---|
| Nickel (plus cobalt where the governing data combines them) | 50.00–55.00 | Major base component; confirm the exact standard's reporting convention |
| Chromium | 17.00–21.00 | Part of the grade identity and corrosion/oxidation-resistance system |
| Niobium plus tantalum | 4.75–5.50 | Important to the precipitation-hardening response |
| Molybdenum | 2.80–3.30 | Part of the specified alloy balance |
| Titanium | 0.65–1.15 | Controlled minor addition; verify against the certificate limits |
| Aluminum | 0.20–0.80 | Controlled minor addition; not a substitute for full chemistry review |
Delivery Condition Must Be Written Separately
Alloy 718 is precipitation hardenable, so “annealed,” “solution heat treated” and “aged” are not casual finish terms. They describe material-processing states that affect later forming, machining and properties. A supplier cannot safely infer the intended final condition from the words “Inconel 718 strip.”
| Condition question | What to state | Why it matters |
|---|---|---|
| Supply condition | Exact condition required by the governing specification | Controls the state in which the strip is delivered and inspected |
| Final aging responsibility | Supplier, fabricator or end user | Prevents an annealed product from being mistaken for a final aged component |
| Forming sequence | Whether the strip will be stamped, rolled, welded or machined before final heat treatment | Connects the ordered condition to downstream fabrication |
| Property acceptance | Condition, test temperature, specimen direction and required report | Typical datasheet values do not replace order-specific limits |
Strip Dimensions and Coil Details
Thickness and width alone are not enough for a coil enquiry. The following fields affect slitting, handling, forming and quotation. Values should be stated from the drawing or process requirement rather than copied from a generic catalogue.
- Thickness: nominal thickness, tolerance and whether local/minimum readings have special controls.
- Width: slit width, width tolerance and measurement method.
- Coil format: coil weight range, inside diameter, outside-diameter limit and winding direction.
- Edge: slit, deburred, rounded or other drawing-defined edge condition.
- Shape: camber, flatness, waviness and telescoping requirements where they affect the process.
- Surface: mill condition, cleanliness, permitted marks and protective interleaving or film if required.
- Cut strip: length, length tolerance, squareness and burr direction when coils are not required.
Inspection and Documentation
The purchase order should connect every requested report to an acceptance requirement. Typical fields include heat/lot traceability, chemical analysis, condition and heat-treatment record, tensile testing, hardness, dimensions and any agreed nondestructive examination. If grain size, stress rupture, surface quality or additional testing is required, state the method, sampling and acceptance criteria rather than requesting a generic “full test.”
For aerospace or customer-qualified work, confirm source approval, process approval and document format before ordering. A material certificate does not by itself prove compliance with a customer drawing, and a product photograph does not prove grade, heat treatment or test results.
Copy-Ready Inconel 718 Strip RFQ Checklist
| RFQ field | Information to provide | Common omission prevented |
|---|---|---|
| Grade identity | Inconel 718 / UNS N07718 / W.Nr. 2.4668 as applicable | Trade-name-only ambiguity |
| Specification | ASTM, AMS or project document and revision | Using a grade identifier as a complete specification |
| Product form | Coiled strip, slit coil, cut strip, sheet or foil | Quoting the wrong flat-product format |
| Dimensions | Thickness, width, length/coil data and tolerances | Assuming catalogue dimensions are acceptance limits |
| Condition | Solution-treated/annealed or other specification-defined condition | Confusing supply condition with final aged properties |
| Edge and surface | Edge type, burr limit, surface, permitted marks and protection | Receiving material unsuitable for the next operation |
| Inspection | Tests, sampling, specimen direction and acceptance values | Requesting documents without defined criteria |
| Quantity and logistics | Quantity, coil-weight range, packing, destination and required documents | Late changes to handling and quotation scope |
Conclusion
W.Nr. 2.4668 and UNS N07718 help identify Alloy 718, but a reliable Inconel 718 strip order also needs a governing product specification and measurable delivery requirements. Separate the grade, standard, product form, dimensions, condition, surface, edge, inspection and documentation. That structure lets suppliers compare the intended scope accurately and reduces avoidable clarification after quotation.
Prepare an Inconel 718 Strip Enquiry
Send the designation, standard and revision, thickness, width, coil or cut-length details, condition, edge, surface, quantity and inspection requirements. SASA Alloy will review the requested scope against the specific enquiry.
Post time: Oct-23-2026