When sourcing forgings in Turkey, a supplier quotation is only the beginning. The buyer needs a documentary chain that connects the purchase order, drawing revision, material identity, heat or lot reference, forging route, inspection results and shipment. If those links cannot be shown before serial production, a low unit price can become an expensive dispute.
What should a forging traceability package contain?
Define the package in the RFQ and purchase order. At minimum, name the buyer part number, drawing revision, material grade or chemistry requirement, approved source route, lot or heat identifier, quantity, inspection plan and release authority. Ask the supplier to show how the identifier stays attached when material is cut, heated, forged, trimmed, machined, coated or packed. The point is not to demand paperwork for its own sake; it is to make a non-conforming shipment containable.
Separate material evidence from dimensional acceptance
A dimensional report cannot prove material identity, and a material document cannot prove every critical dimension. Request both against the same lot. The material record should identify the supplied stock and the supplier’s referenced heat or lot. The inspection record should state the drawing revision, measurement method, sample basis, result and disposition. Where a customer requirement calls for mechanical, hardness, non-destructive or functional testing, specify the method, acceptance rule and laboratory responsibility before the supplier prices the work.
How should buyers audit the document flow?
During a factory visit, follow one production lot from incoming receipt to packing. Check whether receiving labels, job travellers, furnace or process records, in-process checks, final inspection and packing labels use a consistent identifier. Ask the team to retrieve the records for a previously shipped lot. A credible system can explain a gap, quarantine a suspect lot and show what happened next. It should also distinguish in-house operations from subcontracted machining, heat treatment, coating or testing.
Turkey’s Standards Institution, TSE, describes special surveillance activities including supplier/dealer assessment, conformity checks against specifications and customer requirements, and pre- and post-loading surveillance. That is an available additional control point; it is not automatic approval of a factory. TSE Special Surveillance Activities (official source, accessed 31 July 2026).
Build release gates before a production commitment
Use a staged release: technical review, sample approval, controlled pilot lot, then serial release. Freeze the drawing revision at each gate. Record any approved deviation with its scope and expiry. For safety-critical or regulated parts, have the buyer’s engineering and compliance teams define the applicable standards and retention requirements; a general sourcing checklist is not a substitute for product certification.
Questions to put in the RFQ
- Which operations are in-house and which are subcontracted?
- How is the material lot linked to the finished-part lot?
- Which reports accompany each shipment, and in what language?
- What change requires new samples or buyer approval?
- Who may release, quarantine or rework a non-conforming lot?
When should you add third-party or loading-stage checks?
Add them when the shipment cannot be easily reworked, the part has a high cost of failure, the supplier is new, or the documentary chain is incomplete. Agree the inspection scope before the visit: part list, sampling rule, documents to review, photographic evidence, shipment disposition and escalation route. A visit that is not tied to the PO and acceptance criteria may produce observations but not a usable release decision.
FAQ
Does a material certificate alone prove a forged part is compliant?
No. It needs to be linked to the relevant finished lot and used alongside agreed process and inspection evidence.
Should every order use the same documents?
No. The package should reflect the part’s risk, destination-market obligations and buyer specification. Define it before quoting.
Can Corpenza support a supplier-verification process?
Corpenza can coordinate RFQ discipline, supplier checks, inspection planning and production follow-up. Technical acceptance remains with the buyer’s approved specification and responsible engineering team.
For a broader RFQ and quality-control workflow, see our Turkey contract-manufacturing checklist. Planning a forging RFQ or supplier audit? Contact Corpenza.
General information only; not engineering, legal or certification advice.
