Starting material
Record the starting grade and standard, condition, diameter and tolerance, length, quantity, and heat identity. Attach the finished drawing and identify whether the supplier delivers stock, a processed blank, or a finished component. This determines which dimensions and properties belong in the quotation.
Required processing steps
List the proposed sequence, including cutting, heat treatment, peeling, turning, grinding, straightening, machining, threading, polishing, or coating preparation where required. Identify any subcontractor and the state transferred to that operation. Flag steps that can change dimensions, hardness, surface condition, or the readability of markings.
Records for each step
At each required inspection stage, name the characteristic, method, acceptance requirement, sampling or coverage, and report. Link process and test records to the material entering and leaving that step. If marks are removed during processing, agree the replacement identification before the transfer occurs.
Shipment requirements
Confirm the final dimensional and surface checks, document review, and any shipment hold point. Then specify corrosion protection, separators, end protection, bundle supports and mass, marking, packing-list references, and destination. Include the person responsible for resolving damage or discrepancies before dispatch.
The route viewed from the finished feature
Begin with the drawing features that drive acceptance: finished envelope, stock-removal plan, surface-sensitive zones, straightness reference, and any later coating or heat treatment. Then record the ordered bar condition and the sequence expected before release. A label such as hot rolled, peeled, ground, or quenched and tempered describes only part of that chain. It cannot confirm clean-up, final geometry, surface integrity, or suitability for the component. Ask the supplier to declare its offered sequence and any subcontracted step so quotations can be compared on the same process boundary.
Process steps that need an owner
| Part need | Route question | RFQ control |
|---|---|---|
| Substantial stock removal | Can the supplied surface remain outside the finished envelope? | State ordered size, minimum clean-up envelope, and responsibility for removal. |
| Surface-sensitive finished zone | Could remaining seams, laps, or decarburization affect the part? | Name the surface-quality and decarburization assessment required at the agreed stage. |
| Tight geometry before machining | Is straightening, turning, peeling, or grinding part of supply? | Define the delivered condition, geometry characteristic, datum method, and inspection record. |
| Multiple processing sites | Can heat and lot identity survive transfers and re-bundling? | Require a route declaration, marking-transfer rule, and linked inspection document. |
RFQ example
Item: Steel round-bar blanks to drawing [number and revision]
Starting product: [grade, product standard, edition, ordered size, and delivery condition]
Required route: [hot-wrought / heat-treated / straightened / peeled / turned / ground / cut] in the stated sequence
Process responsibility: Supplier to identify each performed and subcontracted stage; no route change without written purchaser approval
Surface and geometry: [inspection stage, clean-up envelope, surface class or acceptance, diameter basis, straightness definition, and roughness where functional]
Traceability: Preserve heat and process-lot links through cutting, processing, inspection, and final bundles
Certificate: ISO 10474 document type [state type] with the actual results and identifiers required by the attached schedule
Alternatives: Quote separately with a clause-by-clause deviation and effect on downstream machining
Questions buyers ask
What should a steel bar processing-route RFQ include?
Buyers should include grade, standard, size, quantity, delivery condition, required processing steps, final application, inspection coverage, certificate needs, packing, destination, and drawings or specifications.
Why should buyers describe the full processing route?
A full route helps buyers align material selection, starting size, delivery condition, downstream processing, inspection, packing, and quotation review before production or shipment planning.
Why should processing route be included in RFQs?
Processing route affects material condition, surface, tolerance, allowance, inspection, packing, and quotation timing. Buyers should list heat treatment, peeling, grinding, machining, threading, protection, and document needs where applicable.
RFQ checklist
- Grade standard and accepted alternatives
- Diameter, length, quantity, rough size, and final size
- Delivery condition and heat-treatment requirement
- Peeling, grinding, machining, threading, or finishing steps
- Application and downstream manufacturing route
- MTC, dimensional, surface, hardness, mechanical, UT, or third-party inspection needs
- Packing, marking, destination, drawings, and shipment document expectations
- Identify the drawing revision and finished features that control route selection.
- List the supplied condition and every operation included in the quotation.
- Define the inspection stage for surface, geometry, and dimensional checks.
- Require heat and process-lot identity transfer through cutting and re-bundling.
- Record alternatives and exceptions in an approved deviation schedule.
References
- ASTM A29/A29M-23 — Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
- ASTM A108-24 — Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished
- ISO 9443:2018 — Surface quality classes for hot-rolled bars and wire rod
- ISO 10474:2013 — Steel and steel products — Inspection documents
Inquiry support
Want us to review the RFQ before quotation?
Send the drawing or RFQ with the grade, size, condition, processing, inspection, quantity, and destination. We can flag open points before quotation.