🔥 NADCAP
NADCAP Accredited Special Process Suppliers in Anderson, SC
NADCAP is the accreditation that turns a competent finishing or heat-treat operation into an aerospace-qualified one, and it works on a level most quality standards do not touch. Where ISO 9001 and AS9100 accredit a company's overall quality system, NADCAP digs into the specific special process, the actual pyrometry, the weld parameters, the penetrant line, and accredits that process to a tightly defined scope. For buyers sourcing special processes in and around Anderson, understanding how that scope works is the whole game.
NADCAPAS9100ISO 9001
What NADCAP Accredits That AS9100 Does Not
AS9100 accredits a manufacturer's quality management system as a whole. NADCAP, run by the Performance Review Institute under the oversight of the aerospace primes themselves, accredits individual special processes against detailed audit criteria. The distinction is critical: a shop can hold AS9100 and still not be qualified to perform a heat treat or a chemical process for aerospace, because that specific process needs its own NADCAP accreditation. NADCAP exists because special processes, by definition, produce results you cannot fully verify by inspecting the finished part, so the process itself must be proven and policed.
The special-process categories NADCAP covers include heat treating, welding, nondestructive testing, chemical processing, surface enhancement, coatings, materials testing, and more. Each is audited by technically qualified auditors against the relevant industry specifications, and accreditation is granted to a specific scope, not blanket coverage. In Anderson, where heat treating, welding, and finishing already serve the automotive and heavy-equipment base, NADCAP is the gateway that lets a qualified operation extend those processes into aerospace and defense.
For a buyer, the takeaway is to never assume that an AS9100 machine shop can perform NADCAP-controlled special processes in-house. If it cannot, it outsources them, and you need to verify the accreditation of whoever actually does the work.
Reading a NADCAP Scope Before You Commit
NADCAP accreditation is meaningless to a buyer until you read the scope, because the accreditation is granted to specific processes within a category, not to the category at large. A heat-treat supplier might be accredited for certain alloy classes and furnace types but not others. A welding source might be accredited for specific processes and material combinations. The scope document, available through PRI's eAuditNet system, defines exactly what is covered, and a process outside that scope is simply not NADCAP-accredited at that supplier no matter what the headline says.
This is where buyers get burned. A supplier advertises 'NADCAP heat treat,' but the accreditation does not cover your specific alloy or pyrometry class. The fix is straightforward: pull the supplier's accreditation in eAuditNet, match the scope line by line against your process requirement, and confirm the accreditation is current and in good standing. eAuditNet also shows merit status; suppliers with strong audit histories earn longer audit intervals, which is a useful quality signal.
Confirm the accredited facility address matches the location that will actually run your process. Like aerospace quality certs, special-process accreditation is site-specific, and a multi-plant supplier may run your alloy at an uncredited location if you do not pin it down.
Frequently Asked Questions
For special processes, yes. AS9100 accredits the overall quality management system, while NADCAP accredits specific special processes such as heat treating, welding, nondestructive testing, chemical processing, and coatings. The two are complementary, not interchangeable. Special processes are defined by the fact that you cannot fully verify their results by inspecting the finished part, so the process itself must be proven and continuously audited, which is exactly what NADCAP does. A shop can hold AS9100 and still lack NADCAP for a given process, meaning it cannot perform that process for aerospace and must outsource it to an accredited source. For buyers in Anderson, the practical rule is to identify every special process your part requires, then confirm each is performed at a NADCAP-accredited source with a scope matching your exact requirement. Never assume an AS9100 machine shop can do in-house heat treat or plating for aerospace just because its quality system is certified.
eAuditNet is the web-based system operated by the Performance Review Institute that hosts NADCAP audit data and accreditation information. It is the authoritative place to verify that a supplier's special-process accreditation is genuine, current, and in good standing. More importantly, it lets you read the accreditation scope, which is the detail that actually matters. NADCAP accreditation is granted to specific processes and parameters within a category, not to the whole category, so a heat-treat supplier might be accredited for some alloy classes and furnace types but not others. Use eAuditNet to match the supplier's accredited scope line by line against your process requirement, confirm the accreditation status, check merit status which reflects audit history and interval, and verify the accredited facility address matches the site that will run your work. Skipping this step is how buyers end up with a supplier that is 'NADCAP accredited' in general but not for the specific process their part needs.
Because their results cannot be fully verified by inspecting the finished part. When you machine a feature, you can measure it afterward and confirm it meets the drawing. But with a special process like heat treating, you cannot fully confirm the resulting metallurgical properties just by looking at or measuring the part; the process has to be controlled and proven to produce the right outcome every time. The same is true for welding integrity, the effectiveness of a penetrant inspection, or the quality of a coating. NADCAP exists precisely because these processes demand that the process itself, the pyrometry, the parameters, the line setup, be audited and accredited rather than relying on end-item inspection. For buyers, this is why special-process sourcing carries documentation and verification obligations that ordinary machining does not. You are trusting process control you cannot see in the part, so the accreditation and the records behind it are your only real assurance.
Sometimes, but often not entirely. Many aerospace and defense parts require a chain of special processes, for example heat treat, then a coating or plating, then nondestructive testing, and each may live at a different NADCAP-accredited source. Anderson's industrial base includes heat treating, welding, and finishing capacity serving automotive and heavy-equipment work, so common processes can frequently be sourced regionally, which compresses lead time and freight and makes site visits practical. The limiting factor is depth: the regional pool of NADCAP-accredited capacity is narrower than the general machining base, and a niche alloy or specialized process may force you to a national source. The pragmatic approach is to keep the common processes local where you can, accept national routing only for the specialized steps, and document every accreditation and hand-off so traceability survives the whole chain. The buyer owns the integrity of that chain, so verify each node's scope individually rather than trusting any single supplier's summary.
Last updated: July 2026
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