Testing PROCESSES
Proof Load Testing
A Proof Load Test is a non-destructive mechanical test performed on fasteners to verify that they can safely withstand a specified tensile load without permanent deformation. This test ensures that the fastener meets the strength requirements set by design specifications and industry standards, providing confidence that it will perform reliably under service conditions.
How the Test is Performed
Specimen Preparation – The fastener is cleaned and mounted in a tensile testing machine.
Load Application – A controlled tensile load, typically a percentage of the fastener’s yield strength, is applied along the fastener’s axis.
Observation – The fastener is monitored to ensure it does not deform permanently under the applied load.
Load Removal – After the specified load is applied and held briefly, it is removed, and the fastener is checked for any signs of permanent elongation or failure.
Documentation – Results are recorded to confirm compliance with specifications and traceability for quality assurance.
Why It is Performed
Proof Load Testing is performed to ensure that fasteners meet their rated strength and can handle service loads safely. By verifying the ability to withstand a specified load without yielding, WN Global helps prevent premature failure in critical assemblies.
Confirms fasteners meet tensile strength requirements
Ensures no permanent deformation under design loads
Validates manufacturing and heat-treatment processes
Enhances safety and reliability in demanding applications
Application to Engineered Fasteners
Engineered fasteners are often used in high-stress, safety-critical environments such as aerospace, oil & gas, nuclear, and defense industries. Proof Load Testing ensures that:
Fasteners can carry design loads safely without yielding
Material and processing integrity are verified
Joint reliability and assembly safety are maintained
Customer confidence is provided through verified mechanical performance
Standards & Compliance
At WN Global, Proof Load Testing is conducted in accordance with ASTM, ISO, and customer-specific standards. Testing equipment is calibrated regularly, and procedures are performed by trained personnel to ensure consistent, accurate, and traceable results. Compliance with these recognized standards demonstrates our commitment to producing engineered fasteners and machined components that meet the highest levels of quality and reliability.
Testing Processes
DOING WHATEVER IT TAKES
Putting Manufacturing Exellence Into Practice
The manufacturing processes, testing capabilities, and quality systems featured throughout WN Global support the production of critical components and engineered fastening solutions across demanding industries. Connect with our team to learn how our manufacturing capabilities can support your project requirements.
