🔥 NADCAP
NADCAP Accredited Special Process Sources Near Lexington, KY
A NADCAP accreditation is process-specific, not company-wide, and that single fact reshapes how aerospace buyers source special processes around Lexington. The metallurgy that makes a titanium or Inconel part fly, heat treatment cycles, chemical processing, weld qualification, nondestructive testing, all gets audited separately to exacting industry specs, and a shop accredited for one process is not accredited for another. Here's how special-process sourcing actually works in central Kentucky and how to verify it.
NADCAPAS9100ISO 9001
NADCAP, the National Aerospace and Defense Contractors Accreditation Program, is administered by the Performance Review Institute on behalf of the aerospace primes. Unlike a quality management certification, NADCAP accredits specific special processes against detailed industry specifications and prime requirements. A supplier doesn't hold 'NADCAP' broadly; it holds accreditation for heat treating, or for chemical processing, or for nondestructive testing, each as a distinct audited scope.
The special processes that typically require NADCAP are exactly the ones where you can't fully inspect the result after the fact. You can't see whether a heat-treat cycle produced the right grain structure and hardness throughout a part by looking at it; you trust the validated, accredited process. The same applies to anodizing and passivation, to welding and brazing where the joint integrity is buried, and to NDT methods like penetrant, magnetic particle, ultrasonic, and radiographic inspection that find subsurface defects.
For buyers around Lexington, the practical takeaway is to read NADCAP scope at the process level. A heat-treat house accredited for aluminum solution treating is not necessarily accredited for the vacuum heat treat your titanium part needs. Confirm the exact process, the specifications, and any prime-specific approvals your customer requires before you assume a local source covers your routing.
What's available regionally versus what ships out
Lexington's industrial base grew on automotive volume, which means the region has substantial heat-treat and metal-finishing capacity, much of it built for automotive parts rather than aerospace special processes. That distinction matters. An automotive heat-treat line that runs millions of parts may not hold NADCAP accreditation, because automotive doesn't require it, even though the underlying capability exists. As the region's aerospace and defense machining grew alongside Lockheed Martin demand, some special-process capacity moved up to NADCAP accreditation, but the aerospace-accredited pool remains thinner than the general industrial pool.
The realistic picture for an aerospace buyer sourcing in central Kentucky is a mix. Machining and assembly are well covered locally and increasingly AS9100 certified. Some special processes, particularly certain heat-treat and NDT scopes, can be found within driving distance. Others, especially specialized finishing, exotic-alloy heat treat, or specific weld qualifications, may need to ship to accredited houses elsewhere in the Midwest or Southeast.
This is why mapping the routing is the single most important sourcing step for NADCAP-dependent parts. Ask the machining supplier, in plain terms, which special processes they perform in house with NADCAP accreditation, which go to regional accredited sub-tiers, and which leave the region. The answer determines your real lead time, your freight legs, and your supply-chain risk.
Verifying accreditation through eAuditNet
NADCAP gives buyers a strong verification tool: eAuditNet, the PRI's online system, lists accredited suppliers and their specific accreditations. Before relying on a special-process source, look them up in eAuditNet, confirm the accreditation is current, and read exactly which processes and specifications are covered. An accreditation listed as merit-status reflects a strong audit history, while a supplier not listed, or listed only for processes other than the one you need, is a clear signal to dig deeper.
Scope verification here is even more granular than in AS9100. NADCAP accreditations enumerate the processes down to the specification and sometimes the prime customer approval. Your customer may require not just NADCAP for, say, fluorescent penetrant inspection, but also approval to their specific process spec. Confirm both the NADCAP accreditation and any customer-specific qualifications your prime flows down.
Alongside the database check, ask the special-process source for evidence the process is controlled day to day: furnace survey and pyrometry records for heat treat, tank chemistry logs and titration records for chemical processing, operator certifications for welding and NDT to standards like NAS 410 or equivalent. A NADCAP accreditation is the audit credential; these records show the process is actually in control on the day your parts run.
Documentation, metallurgy, and the records that prove a process ran right
Because special processes can't be fully verified after the fact, the documentation accompanying NADCAP work is the proof of conformance, and you should specify exactly what lands with each lot. For heat treatment, that means a certification citing the spec and revision, the actual cycle parameters, and where required, witness-coupon test results, hardness readings, and metallurgical evidence the part met the called-out condition. The metallurgy is the deliverable: you're buying a microstructure and mechanical properties, not just a thermal cycle.
For chemical processing and coatings, expect certifications citing the process spec, coating thickness measurements where applicable, and adhesion or corrosion-resistance test results per the requirement. For welding, expect records tying the work to a qualified procedure and a certified welder, plus any required NDT of the welds. For NDT itself, expect the inspection record, the technique used, the acceptance standard, and the certified level of the inspector who performed and accepted the work.
Traceability stitches it together. A complete special-process record ties your part back through the machining supplier to the heat-treat lot, the chemistry batch, the weld procedure, and the inspector, all referenced against your drawing revision. When you source NADCAP work around Lexington, confirm the chain produces this package and retains it, because if a metallurgical issue surfaces in service, that documentation is what lets you trace it to a process run and contain the exposure.
Frequently Asked Questions
NADCAP is fundamentally different from a quality management certification like AS9100 or ISO 9001 because it accredits specific special processes, not the company as a whole. The Performance Review Institute audits each special process, heat treating, chemical processing, nondestructive testing, welding, coatings, and others, against detailed industry specifications and prime requirements, and issues accreditation for that specific scope. A supplier therefore holds NADCAP accreditation for, say, heat treating and separately for nondestructive testing, each earned and maintained independently. This granularity exists because the technical requirements and audit checklists for, say, ultrasonic inspection have nothing in common with those for anodizing. For buyers, this means you must always verify NADCAP at the process level. A shop that is NADCAP accredited for one special process is not accredited for another, and even within a process category, accreditation is scoped to specific methods and specifications. Look the supplier up in eAuditNet and confirm the exact process, method, and specification your part requires appears in their current accreditations before you route work to them.
Probably not all of them, and mapping which ones you can is the key sourcing task. Lexington's industrial base grew on automotive manufacturing, which gave the region substantial heat-treat and metal-finishing capacity, but much of that capacity was built for automotive parts and doesn't carry NADCAP accreditation because automotive doesn't require it. As aerospace and defense machining grew in the region alongside Lockheed Martin operations, some special-process capability moved up to NADCAP accreditation, but the aerospace-accredited pool remains thinner than the general industrial pool. Realistically you'll find machining and assembly well covered locally, certain heat-treat and NDT scopes available within driving distance, and specialized finishing, exotic-alloy heat treat, or specific weld qualifications often requiring shipment to accredited houses elsewhere in the Midwest or Southeast. The disciplined approach is to ask your machining supplier exactly which special processes they perform in house with NADCAP, which go to regional accredited sub-tiers, and which leave the region. That routing map determines your true lead time, freight, and risk.
Use eAuditNet, the Performance Review Institute's online system, which lists NADCAP accredited suppliers and their specific accreditations. Search the supplier, confirm the accreditation is current, and read exactly which processes, methods, and specifications are covered, since NADCAP scope is highly granular and enumerated down to the specification and sometimes the prime customer approval. A supplier listed with merit status reflects a strong audit history with extended accreditation intervals, while a supplier not listed for your specific process is a signal to look elsewhere or ask hard questions. Beyond the database, confirm any customer-specific qualifications your prime requires, because a prime may demand both NADCAP accreditation and approval to its own process specification. Finally, ask the source for evidence the process runs in control: pyrometry and furnace-survey records for heat treat, tank chemistry logs for chemical processing, and operator certifications to standards like NAS 410 for NDT. The accreditation proves the audit; those records prove the process was actually in control the day your parts ran.
Because special processes can't be fully verified by inspecting the finished part, the documentation is your proof of conformance and you should specify it explicitly in the purchase order. For heat treatment, require a certification citing the specification and revision, the actual cycle parameters, and where called out, witness-coupon mechanical test results, hardness data, and metallurgical evidence the part reached the required condition, you're buying a microstructure, so the metallurgy is the deliverable. For chemical processing and coatings, require certifications citing the process spec, coating thickness measurements, and any adhesion or corrosion test results. For welding, require records tying the work to a qualified procedure and certified welder plus any required weld NDT. For NDT, require the inspection record, technique, acceptance standard, and the certified level of the inspector. Traceability ties it together, linking your part back through the machining supplier to the specific heat-treat lot, chemistry batch, weld procedure, and inspector, all against your drawing revision. Confirm the chain produces and retains this complete package, since it's what lets you trace a metallurgical issue to a process run if one ever surfaces in service.
Last updated: July 2026
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