Met-L-Chek® is an approved manufacturer, qualification laboratory, and supplier of liquid penetrant inspection materials under SAE QPL AMS 2644 by the United States Air Force Research Laboratory’s Materials and Manufacturing Directorate at Wright-Patterson Air Force Base.
Our liquid penetrant and magnetic particle materials are certified to meet the requirements of AMS, ASTM, ASME, ISO, DoD specifications and trusted by Pratt & Whitney, General Electric, Rolls-Royce, Boeing, Consolidated Precision Products, Mistras, and Precision Castparts Corp.
Our quality assurance program is ISO 9001:2015 certified and compliant with 10CFR part 21, 29CFR 1910, MIL-Q-9858, and MIL-I-45208. Met-L-Chek’s European licensee, NDT Europa B.V. ®, is ISO 9001 certified and manufactures Met-L-Chek products which are fully approved to the same specifications as the Met-L-Chek brand of materials and Pen-Chek® and Mag-Chek™
We have been audited and approved by the United States Air Force, the United States Navy, BWIP, MetalTek International, Flowserve, Curtiss-Wright, Enertech (NIAC), Shellcast Foundries, Tech Cast, Robinson Helicopter, and other major qualification firms.
We welcome audits by our customers or other authorized representatives.
We are an environmentally conscientious manufacturer of quality inspection materials.
Our products do not contain ozone-depleting substances, polychlorinated biphenyls, known carcinogens, mercury, and comply with the requirements of RoHS and REACH.
Our materials are formulated to be as environmentally friendly as possible and our manufacturing processes do not create hazardous waste.
Products & Services
IN-USE PENETRANT MAINTENANCE
The penetrant inspection process is an inexpensive way to evaluate the surface integrity of metal and some non-metal parts. It is capable of highlighting cracks and porosity open to the surface, which could under stress cause the failure of the part. The materials used should be of high quality, being listed on the QPL (qualified products list) for AMS-2644. The process should be closely controlled to ensure uniformity, using processing specifications such as ASTM E-165, ASTM E-1417, AMS-2647 or OEM versions of these. The process and materials should be monitored to ensure consistency and reliability. ASTM E-1417 has a monitoring guide which covers the process, equipment and materials.
Controlled conditions are created to isolate the brightness factor in the fluorescent dye penetrant and evaluate it compared to the ASTM E-1417 specific relative brightness percentage requirement based on the sensitivity level 1-4.
This test measures the water content of Method A Penetrants and Method B (Lipophilic) Emulsifiers. It is required because excess water in the penetrant reduces fluorescence, penetrating ability and adversely affects washability. ASTM E-1417 limits water content to 5% or less. When water content exceeds 5%, it can be corrected through the addition of the same liquid penetrant type, method, and sensitivity to the bath.