Nadcap Hardness Testing Solutions
Hardness Testing Solutions for NADCAP Accreditation & Audit

The Partner for Your NADCAP Success
Since 1936 Buehler has been a leading supplier of materials preparation, hardness testing equipment and accessories for industrial manufacturers. For more than 100 years Reicherter, Wolpert, and Wilson® have designed and manufactured innovative and unique hardness testers. Today Buehler continues in their path with new designs and technologies to meet growing demands. In 2011, Wilson Hardness was combined with Buehler to provide a more robust product offering for the ITW Test and Measurement division.
The National Aerospace and Defense Contractors Accreditation Program (NADCAP) is a global cooperative accreditation program for aerospace, defense and related industries. The program develops industry-wide manufacturing processes that are applied by aerospace accredited manufacturers and suppliers. These processes can be found in different areas of material-recovery, such as coating, heat treatment and welding processes as well as inspection methods, such as hardness testing and microstructural analysis. Buehler’s experience, expertise and robust equipment help suppliers and manufacturers meet the aerospace industry’s NADCAP accreditation.
Why select Buehler as Your Partner for NADCAP?
Buehler’s Wilson Hardness Calibration Laboratory is Recognized Globally
The lab is accredited to ISO/IEC 17025 by A2LA and the testers used in the calibration process undergo a stringent monitoring process using NIST traceable devices. Test blocks undergo 100% inspection and meet ASTM physical requirements.Wilson Hardness Testers Are Proven Industry Leaders
Fully Traceability is Guaranteed with DiaMet Hardness Software
Buehler developed a special verification software module within the DiaMet hardness software. The verification program will prompt operators to perform indirect verification tests as required. This way, full traceability is guaranteed and is clearly exhibited during audits.
Calibration and Cleaning Services
Buehler is Accredited for Direct and Indirect Calibration
Buehler adheres to ISO 9001, ISO14001, ASTM, DIN, ISO, MIL standards. The company is accredited to ISO/IEC 17025 for ASTM and ISO standards for calibration. Buehler is accredited by A2LA Certificate Number: 2237.01 for direct and indirect calibration of:
- E92/E384 -All Vickers and Knoop Scales
- E18 – All regular and superficial Rockwell scales noted in Certificate 2237.01.
- E10-10/3000 and 10/500 full range direct and indirect.
Buehler Has the Team to Assist NADCAP Accredited Customers
As part of the ITW Test & Measurement Group, Buehler maintains its own service department of experienced service engineers and also coordinates verification with Instron and an experienced distributor service team. We have global presence and global experience in working with customers to meet NADCAP audits.

Solid Partner for Your Metallography Laboratory
- Consultation Available for New Equipment or Improved Processes. Buehler field engineers and laboratory experts are available to provide custom solutions for your application. Buehler Sales Rep.
- Buehler carries a complete line of metallography equipment from sectioning, grinding / polishing, mounting, image analysis to hardness testing.
- Service Technicians Available for Calibration. An accredited technician will perform a scheduled calibration in compliance with current ASTM. E10, E18 or E384 using N.I.S.T. traceable standards where applicable. For service requests, visit Buehler Service.
- Certified hardness reference blocks for Rockwell, Brinell, Vickers and Knoop hardness testers produced in our own facility.
- Complete line of consumables available. Most are in stock and ready to ship daily. Visit Buehler eStore.


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