| Product definition and drawing control | Confirm the card or plate dimensions, thickness, tolerances, flatness, hole locations, edge finish, surface finish, fiber orientation, and resin system against an approved drawing. | Buyer-approved technical drawing and revision control; no single standard defines every carbon-fiber card specification. | Request a signed drawing review, a first-article inspection report, and measurement results for the agreed critical dimensions. |
| Material and construction traceability | Identify the fiber and resin specifications, laminate schedule, batch or lot number, manufacturing date, and any permitted material substitutions. | Purchase specification and supplier material traceability records. | Compare material certificates and production records with the purchase order; require written approval before substitutions. |
| Quality management system | Check whether the supplier’s quality system is appropriate for the intended market and product risk. Certification scope and site should cover the actual manufacturing operation. | ISO 9001:2015; AS9100D for organizations in the aviation, space, and defense supply chain; IATF 16949:2016 for applicable automotive supply chains. | Request a current certificate and verify its validity, scope, issuing certification body, and covered production site with the issuer or accreditation database. |
| Mechanical test evidence | Check that test methods, specimen preparation, conditioning, and reported results match the material form and acceptance criteria in the contract. | ASTM D3039/D3039M for tensile properties of polymer-matrix composite materials; ASTM D790 for flexural properties of plastics; ASTM D2344/D2344M for short-beam strength of polymer-matrix composite materials. | Review dated test reports for the relevant material construction and lot. Confirm the laboratory, test method edition, sample details, and results; do not treat unlike layups as directly comparable. |
| Dimensional and visual inspection | Define acceptance limits for thickness, flatness, surface defects, edge quality, and visible voids or delamination indications. | Contract-specific inspection plan and acceptance criteria. | Ask for inspection records tied to the shipment lot and agree in advance on sampling, measurement equipment, and defect disposition. |
| Restricted substances and market compliance | Determine which laws apply to the product’s destination and end use. Request substance declarations for the actual supplied material and any coatings, adhesives, or finishes. | EU REACH Regulation (EC) No 1907/2006; EU RoHS Directive 2011/65/EU applies to electrical and electronic equipment within its scope, not automatically to every carbon-fiber product. | Obtain a current, product-specific declaration and supporting test or supplier records where appropriate. Confirm applicability with the importer or compliance specialist. |
| Environmental management | Assess whether environmental controls, waste handling, and relevant site procedures meet the buyer’s supply-chain requirements. | ISO 14001:2015 environmental management systems. | Verify the certificate’s site and scope; treat certification as evidence of a management system, not proof that a particular product meets every environmental requirement. |
| Production capability and capacity | Confirm the supplier’s actual processes, available panel or part sizes, machining capability, lead-time assumptions, minimum order quantities, and capacity for repeat orders. | Capability statement and buyer-approved process requirements. | Request process-flow information, recent examples of comparable work, a production schedule, and a documented contingency plan for delays or equipment outages. |
| Supplier identity and site verification | Establish the legal entity, manufacturing address, ownership or authorized trading role, and whether production is performed in-house or subcontracted. | Business registration and applicable local licensing records. | Cross-check legal documents, invoices, bank-beneficiary details, and the production-site address. Conduct a site audit or use an independent inspection when risk warrants it. |
| Sampling and change control | Agree on sample approval, production-equivalence requirements, and advance notification of changes to materials, processes, tooling, site, or subcontractors. | Contract quality clauses and an agreed change-notification procedure. | Retain an approved reference sample where practical and require written review of changes before affected goods are produced or shipped. |
| Packaging and international shipping | Specify protection against impact, abrasion, moisture, contamination, and transit movement; agree on labeling and shipment documentation. | Purchase order and agreed packaging specification; Incoterms® 2020 rules for allocating specified delivery obligations, costs, and risks. | Review a packaging sample or packing photographs. State the named place and selected Incoterms® rule in the contract and confirm export-document responsibilities. |
| Customs classification and origin | Confirm the product description, declared customs value, origin, and tariff classification for the importing country. | Destination-country customs rules and tariff schedule; classification depends on product characteristics and jurisdiction. | Have the importer or customs broker validate the classification and origin documents. Do not rely solely on a supplier’s suggested tariff code. |
| Commercial and delivery risk | Set payment milestones, inspection rights, remedies for nonconforming goods, delivery dates, warranty terms, and responsibility for freight and insurance. | Written purchase contract and the selected Incoterms® 2020 rule. | Match contract terms across the quotation, purchase order, invoice, and shipping documents; use independently verified payment details. |