The Applied Technical Services Family of Companies (ATS FoC) performs bolt yield testing to determine the maximum stress a bolt can withstand before experiencing permanent deformation. Once a bolt yields, it may no longer provide the necessary clamping force needed to function properly.
Our experts apply ASTM, ASME, SAE, and ISO standards to measure mechanical properties and assess whether bolts return to their original length after loading or show permanent stretch.
How is Bolt Yield Strength Determined?
Bolt yield strength is determined through tensile testing by applying a steadily increased axial force to a bolt until it starts to permanently deform. The yield strength is calculated by dividing the load at the yield point by the bolt’s tensile stress area, indicating the maximum stress the bolt can withstand before permanent stretching occurs.
At ATS, our engineers can also apply tensile testing to measure:
- Fastener Yield Strength
- Tensile Strength
- Percent Elongation
- Reduction of Area
What Services Support Bolt Yield Testing?
Our bolt yield testing program integrates additional laboratory testing and engineering services to deliver precise data, helping clients confirm that their products, materials, and infrastructure meet industry standards and application requirements. Supporting services include, but are not limited to:
- Mechanical testing
- Fastener testing
- Material characterization
- Certification and compliance support
- Metallurgical engineering
Beyond bolt yield testing, our comprehensive failure analysis services help verify specification compliance and determine cause of failure.
SGS and ATS: Trusted Expertise, Unified Partnership
Founded locally in 1967, ATS has built a reputation as a trusted testing provider committed to safety and reliability. Our state-of-the-art labs hold ISO/IEC 17025:2017 (A2LA) accreditations for a variety of mechanical testing methods in accordance with our ISO 9001:2015-registered quality management system.
Since joining SGS in 2026, the global leader in testing, inspection, certification, and calibration (TICC) services, ATS has expanded its capabilities to support TICC clients across diverse industries worldwide. Together, we combine our expertise to help create a safer, more reliable world.
Contact Us
To learn more about our full list of mechanical testing capabilities or to schedule a bolt yield test today, contact ATS at +1 (888) 287-5227 or submit a web request form.
