Nadcap Accreditation
Nadcap accredits special processes one at a time, which is why buyers search it by process. What the by-process demand looks like and how an accredited supplier should present it.
Nadcap accredits special processes individually rather than accrediting a company, so a supplier accredited for heat treating is not accredited for welding. Buyers therefore search it by process, and each process carries its own small, uncontested demand.
Almost every error suppliers make with this accreditation follows from treating it as a company credential. It is not one, and the buyer knows it.
The demand is by process, and it is thin in every direction
The head term measured 80 monthly searches at difficulty 4 in August 2026, and the top ten held one directory across the whole result set. Standards bodies and manufacturer pages held the rest.
That is the pattern across this cluster and it is more pronounced here, because Nadcap demand fragments by process. Heat treating, welding, non-destructive testing, chemical processing, coatings, and materials testing each generate their own search behaviour, and each one is smaller and less contested than the term above it.
A supplier accredited for one process competes for that process's demand and no other. The fragmentation that makes the accreditation hard to explain is what makes each slice reachable.
What it actually gates
Nadcap accredits special processes individually, and a prime contractor requiring it names the process in the requirement rather than the accreditation in general.
It sits alongside a quality certification rather than replacing one. AS9100D certification qualifies a supplier for aerospace and defense requests for quote, and prime contractors frequently require both AS9100D and specific Nadcap accreditations for the processes involved. Holding one is not evidence of the other.
Merit status, awarded for sustained performance, extends the interval between audits. It is worth stating because it is evidence of history rather than of a single passed audit.
How to present it
List each accredited process separately, with its own audit date and expiry. A page saying "Nadcap accredited" tells a buyer filtering on welding nothing, and a buyer filtering on welding is the only buyer this page can win.
Name the commodity code where the supplier knows it, since the primes use them and the terminology is precise.
State what is subcontracted. A shop that sends heat treating out is common and unremarkable, and a buyer who discovers it after quoting treats it as concealment rather than as normal practice.
The wider aerospace requirement set that surrounds this is at aerospace and defense manufacturing, and the quality standard it accompanies is defined at AS9100.
Why this page exists
It is the canonical reference the aerospace and defense pages link to when they name the accreditation, which is what keeps the same explanation from being written three times. The cluster's reasoning is at certifications, and the wider programme argument at manufacturing SEO.
Common questions
Is Nadcap a certification?
It is an accreditation of a process, awarded through an industry-managed programme. The distinction matters because certification usually attaches to a company and this does not.
Can a supplier claim Nadcap without holding it?
Working to a Nadcap-accredited subcontractor is legitimate and is a different claim. Stating it that way is accurate and stating "Nadcap accredited" is not.
Does it help outside aerospace?
Occasionally in medical and energy work, as evidence of process control. It is required in aerospace and defense and rarely required elsewhere.
How many processes should a shop pursue?
The ones its customers require. Each accreditation carries an audit burden, and pursuing breadth here is expensive in a way that certification breadth is not.
Sources
- 01
Last reviewed . Published by ManufacturingSEO.ai.