1. Material identity
Inconel 718 / UNS N07718, controlling standard and revision, and whether the item is bar, forging or forging stock.
Buyer resource · UNS N07718
Inconel 718 Round Bar RFQ Guide
Alloy 718 is age-hardenable, so the grade name alone is not a complete purchase description. A usable RFQ should identify the governing specification, required delivery condition, dimensions, inspection and documentation.
Start with the controlling documents
Specification and condition must travel together
Inconel 718 is commonly identified as UNS N07718 or W.Nr. 2.4668. For round bar, buyers often reference ASTM B637 or a project-specific AMS document. These references should not be treated as interchangeable: the required condition, heat treatment, testing and acceptance criteria may differ.
State the exact specification and revision required by the drawing, end user or purchase order. If the requirement is still being developed, say so and request a documented technical review before quotation.
RFQ fields
Information needed for a checkable quotation
2. Size and finish
Diameter, tolerance, length, straightness or machining allowance, plus peeled, ground, turned or other surface requirements.
3. Delivery condition
Required solution-treated or age-hardened condition exactly as defined by the applicable specification or drawing.
4. Quantity
Total kilograms or number of bars, acceptable piece lengths, cut-piece quantities and any sample requirement.
5. Inspection and documents
MTC requirements, heat-number traceability, dimensional report and any ordered UT, PMI or third-party inspection.
6. Packing and delivery
Marking, rust/moisture protection where applicable, bundle or export-case preference, Incoterm and destination.
Avoid a common sourcing error
ASTM B637 and AMS callouts are not shorthand for the same supply condition
ASTM B637 covers precipitation-hardening nickel alloy bars, forgings and forging stock, while individual AMS documents can define a narrower product form and condition. Do not request “ASTM/AMS equivalent” without identifying which document controls acceptance.
Where aerospace or other controlled applications are involved, include the complete drawing note, revision, approved-source restrictions and additional testing requirements in the RFQ. A commercial material offer should not be assumed to satisfy an aerospace purchase specification.
Release controls
Inspection and traceability to define before the order
Material certificate
Request a certificate tied to the heat number and governing specification. Chemical and mechanical results should be reviewed against the ordered condition.
Dimensions and surface
Agree the measurement points, tolerance, straightness, cut length and acceptable surface condition before production or cutting.
Additional testing
Order ultrasonic testing, PMI, macro examination or third-party witness only when required, with the method and acceptance criteria stated.
Marking and packing
Preserve heat/lot identification through cutting and packing. Specify tags, bundle separation and export protection needed at destination.
Note: PMI can support alloy identification, but it does not replace the ordered material certificate or mechanical-test evidence.
Schedule risk
What usually changes lead time
Lead time depends on diameter and length, melt and supply route, delivery condition, machining or grinding, ordered testing, document review and packing. Special diameters, controlled heat-treatment requirements and third-party inspection should be identified before the purchase order rather than added at final release.
Copy and send
Inconel 718 round bar RFQ template
| Grade | Inconel 718 / UNS N07718 / W.Nr. 2.4668 |
|---|---|
| Product form | Round bar (state if forging or forging stock is required) |
| Specification | Exact ASTM, AMS or project specification and revision |
| Condition | Required solution/age condition exactly as ordered |
| Dimensions | Diameter × length, tolerance, straightness and machining allowance |
| Quantity | Total weight, number of bars or cut-piece schedule |
| Inspection | MTC, dimensional report, UT/PMI/third-party inspection if required |
| Marking and packing | Heat traceability, tags, bundles or export case |
| Delivery | Destination, Incoterm and required delivery window |
Continue checking
Related Alloy 718 resources
Inconel 718 Product Page
Product forms, standards and initial sourcing information.
View Alloy 718UNS N07718 Guide
Grade identity and procurement context for Alloy 718.
Open UNS guideAlloy 625 vs 718
Compare two frequently confused nickel alloy families.
Open comparisonQuality Workflow
Review material identification, inspection and packing checkpoints.
Review quality processTechnical background: Special Metals INCONEL alloy 718 bulletin. The purchaser-approved drawing and current specification revision remain controlling.