Best NDT Companies in Illinois
Illinois has one of the largest nuclear power fleets in the United States — operated by Exelon (now Constellation Energy) — making the state a major market for ASME Section XI in-service inspection, PDI-qualified UT services, and NQA-1–compliant inspection organizations. Chicago and the surrounding industrial corridor also support significant manufacturing NDT demand, particularly for the food and beverage equipment, construction machinery, and transportation equipment sectors. Illinois's extensive rail and highway infrastructure, including the Chicago area's critical role as the nation's railway hub, creates ongoing demand for structural steel weld inspection, bridge NDT, and rail inspection services.
Why these suppliers?
- ✓Illinois's nuclear fleet — the largest in the U.S. at eleven operating reactors — creates the deepest concentration of nuclear-qualified NDT companies, PDI-qualified technicians, and NQA-1 inspection service organizations of any state outside the Southeast.
- ✓Chicago's manufacturing base — from food equipment to railway cars to construction machinery — provides NDT companies with broad manufacturing inspection experience and ISO 9001–integrated quality programs.
- ✓Illinois NDT companies serving Chicago's transportation and infrastructure sector have specialized experience in rail inspection (UT axle and wheel inspection, rail testing), bridge structural assessment, and high-density urban access conditions.
449 verified suppliers found
Slidematic is the industry leader in cold-headed fastener manufacturing. Call us at 815.986.0500 for more information or to get a quote.
9100 (9001:2015) certified. Certification body: Perry Johnson Registrars, Inc.. Structure: Single Site.
9100 (9001:2015) certified. Certification body: DQS Inc.. Structure: Single Site.
Expand your capabilities, and increase productivity with Sodick's cutting-edge EDM, high-speed milling, and additive manufacturing solutions.
EXPERT CRAFTSMANSHIP, ENGINEERING AND QUALITY SERVICE SINCE 1925.OUR HISTORYWhat we doOUR SERVICESTool & DieStar Tool & Die Works creates tools and dies for any size part. Our 30,000 square-foot plant includes a wide range of modern CNC electronic mills to meet your most exacting specifications.READ MORECLEANINGTST.1. surface cleanliness analysis system features enhanced laser technologies
Sugar River Machine is a small machine shop based out of South Beloit, Illinois since 1995. We build long-lasting, affordable parts.
General overview of Summit Tool Design reviewing the company's history and basic listing of services offered.
Save time & money with Sycamore Precision, from engineering, to machining, powder coating, and assembly all under one roof since 1978.







