🔥 NADCAP
NADCAP Accredited Special-Process Suppliers in Charlotte, NC
NADCAP is where aerospace and high-end energy sourcing gets specific, because it accredits the special processes, the heat treat, the welding, the penetrant and X-ray inspection, the surface finishing, that ordinary quality certificates don't actually qualify a shop to perform on flight or rotating hardware. In Charlotte's growing aerospace base, getting these processes from accredited sources is what keeps parts from being rejected at a prime's receiving dock. This page covers which special processes matter most locally, how to verify accreditation in eAuditNet, and how NADCAP fits with the AS9100 shops doing the machining.
NADCAPAS9100ISO 9001
What NADCAP Accredits and Why Machining Certificates Don't Cover It
NADCAP, run by the Performance Review Institute, accredits special processes, the operations whose quality can't be fully verified by inspecting the finished part. You can measure a machined dimension, but you can't see whether a heat-treat cycle hit the right metallurgy, whether a weld has subsurface porosity, or whether a coating bonded correctly, just by looking. That's why aerospace primes require these processes to come from NADCAP-accredited sources, and why an AS9100 or ISO 9001 certificate on a machine shop does not, by itself, qualify it to perform them.
The common NADCAP commodities a Charlotte buyer encounters are heat treating, welding, non-destructive testing (penetrant, magnetic particle, radiographic, ultrasonic), chemical processing and surface finishing (anodize, plate, passivate, chem film), and materials testing. Each is accredited to specific specifications and methods, not as a blanket stamp. A supplier accredited for fluorescent penetrant inspection is not automatically accredited for radiographic inspection.
For procurement, the mental model is this: machining shops machine, and special processes are a separate discipline that must be sourced from accredited operations whether that's an in-house accredited line or an approved subcontractor. Treating NADCAP as a checkbox on the machine shop's certificate is exactly the mistake that gets parts rejected.
Which Special Processes Charlotte's Industries Drive
Charlotte's industrial mix shapes which NADCAP commodities come up most. The region's energy-equipment heritage, turbine, valve, and rotating-equipment work, leans heavily on heat treating and welding, since alloy steels and superalloys need controlled thermal processing and high-integrity welds, often verified by radiographic or ultrasonic NDT. As that base feeds aerospace, the same heat-treat and weld disciplines carry over, now under tighter aerospace specifications.
The aerospace expansion specifically drives NDT and surface finishing. Flight hardware routinely requires fluorescent penetrant or magnetic-particle inspection on machined and welded parts, and aluminum airframe components need anodizing or chem film for corrosion protection, both NADCAP-accreditable processes. Defense-adjacent work adds its own specification flowdowns and, frequently, specialty-metals and country-of-melt traceability that sit on top of the process accreditation.
For a buyer, mapping your part's routing to these commodities early matters. A single energy or aerospace part can pass through machining, heat treat, NDT, and finishing, each potentially a separate NADCAP-accredited operation. Knowing which processes your drawing calls out, and to which specifications, tells you exactly which accreditations to verify and where the schedule risk sits.
Verifying Accreditation in eAuditNet, to the Specification
NADCAP accreditations are recorded in eAuditNet, the Performance Review Institute's database. For any special-process source feeding your Charlotte part, look it up in eAuditNet and confirm three things: the supplier is currently accredited, the accreditation covers the specific commodity you need (heat treat, welding, NDT, surface finishing), and, critically, it covers the exact specifications and methods your drawing calls out. Accreditation is granted at the process-and-specification level, so 'NADCAP accredited' alone is not enough.
Layer on the prime's approved-source requirement. Many aerospace and defense programs require the special-process source to appear on the prime's own approved-supplier list, regardless of NADCAP status. Confirm whether your contract imposes that, then verify the source meets both the NADCAP accreditation and the prime approval.
Red flags include a special process performed by a shop with no eAuditNet record, an accreditation that covers a different specification than your print, an expired or merit-status accreditation you haven't confirmed is acceptable for your program, or a machine shop subcontracting heat treat or NDT to an unaccredited source to save cost. On flight or rotating hardware, any of these can fail the part at receiving inspection, after you've already paid for the machining.
Records, Cost, and Lead-Time Realities for Special Processes
NADCAP special processes add documentation and time, and a buyer should plan for both. Expect a certificate of conformance for each special process tied to your specific lot, citing the specification and revision, plus the underlying process records, heat-treat charts, NDT reports with technician certification level, plating thickness or coating-weight data. For welding, expect qualified welder and procedure documentation. These records are part of the part's traceability package and your customer audits will eventually ask for them.
On cost and lead time, special processes are often the hidden schedule driver. Routing a part out to an accredited heat-treat, then to NDT, then to finishing, each with its own queue, can add days or weeks beyond the machining time, especially when source inspection or prime approval sits in the chain. Charlotte's freight position via the I-85/I-77 corridor and the airport helps compress transit between operations, but the queue time at each accredited source is the real variable. The practical move is to identify every special process on your part up front, confirm accredited sources and their current lead times early, and sequence them so an accreditation-limited process doesn't become the bottleneck that makes an otherwise on-time part late.
Frequently Asked Questions
No, and assuming it does is one of the most common and costly sourcing mistakes. AS9100 certifies the shop's overall aerospace quality management system, but special processes, heat treating, welding, non-destructive testing, plating, anodizing, and similar operations, require separate NADCAP accreditation specific to each process and specification. An AS9100 machine shop in Charlotte may perform excellent machining and assembly while subcontracting its special processes to outside sources, which must themselves be NADCAP accredited. The shop's AS9100 certificate governs how it manages and flows down those processes, but it does not make the shop competent or qualified to perform an unaccredited special process on flight hardware. When sourcing, ask the AS9100 shop for its approved-supplier list covering each special process on your part, then verify each of those sources in eAuditNet against the exact specifications your drawing calls out. If any special process on your routing is performed by a source with no current NADCAP accreditation for that specific process and specification, the part is at risk of rejection at the prime's receiving inspection regardless of how good the machining is.
Use eAuditNet, the database maintained by the Performance Review Institute, which administers NADCAP. Look up the supplier and confirm three things in order. First, that the accreditation is current, not lapsed. Second, that it covers the specific commodity you need, since heat treating, welding, NDT, and chemical processing are accredited separately and an accreditation in one does not extend to another. Third, and most important, that it covers the exact specifications and methods your drawing calls out, because NADCAP accreditation is granted at the process-and-specification level. A supplier accredited for fluorescent penetrant inspection, for example, is not automatically accredited for radiographic inspection, and one accredited to one heat-treat specification may not be accredited to another. Beyond eAuditNet, check whether your prime or program requires the source to also appear on the prime's own approved-supplier list, which many do regardless of NADCAP status. Red flags include no eAuditNet record at all, an accreditation scope that doesn't match your print's specifications, or a machine shop quietly subcontracting a special process to an unaccredited source. Verify before you release the part to production.
Charlotte's industrial profile drives a recognizable set of NADCAP commodities. The region's energy-equipment heritage, turbines, valves, and rotating equipment, leans heavily on heat treating and welding, since the alloy steels and superalloys involved require controlled thermal processing and high-integrity welds that are then verified by non-destructive testing such as radiographic or ultrasonic inspection. As that capability feeds Charlotte's growing aerospace supply chain, those same heat-treat and weld disciplines carry over under tighter aerospace specifications, and non-destructive testing becomes even more prominent, with fluorescent penetrant and magnetic-particle inspection common on machined and welded flight parts. Surface finishing is the other major commodity, since aluminum aerospace components frequently require anodizing, chem film, or plating for corrosion protection, all NADCAP-accreditable. Defense-adjacent work layers additional specification flowdowns and specialty-metals traceability on top. For a buyer, the practical step is to map your specific part's routing, identify every special process and the specification each is called to, and then verify accredited sources for each. A single energy or aerospace part often passes through machining, heat treat, NDT, and finishing, each a potentially separate accredited operation with its own lead time.
Each special process should ship with a certificate of conformance tied to your specific lot, citing the specification and revision the process was performed to, along with the underlying process records that prove conformance. For heat treating, that means furnace charts or equivalent records showing the actual time-temperature cycle. For non-destructive testing, expect the inspection report with the technician's certification level (such as Level II or Level III per the applicable standard) and the acceptance criteria applied. For surface finishing and plating, expect coating-thickness, coating-weight, or process-parameter data as the specification requires. For welding, expect documentation of the qualified welding procedure and welder qualification. These records form part of the part's overall traceability package and your own customer audits will eventually request them, so collect and retain them rather than relying on the source to hold them indefinitely. Specify in your purchase order exactly which records must accompany each special process and tie them to lot traceability. A mature NADCAP-accredited source in Charlotte will produce this documentation as a matter of routine, since record discipline is inherent to maintaining accreditation, but you should define the requirement explicitly so nothing is missing when a part needs to be reconstructed later.
Last updated: July 2026
Find NADCAP-Certified Manufacturers in Charlotte, NC
Search verified Charlotte shops that hold NADCAP.
No logins. No email gates. Just results.