Metallurgical and Mechanical Properties of GMW 16535 Wheel Bolts and Studs

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of GMW 16535 testing. This standard covers metallurgical, machining and mechanical requirements for passenger car and truck wheel bolts and studs.

This standard describes knurled and non-knurled shank wheel bolts and studs. Serrated shank wheel bolts and studs include requirements carburized and quenched and tempered. Non-knurled quenched and tempered bolts and studs are also described.

The purpose of this standard is to ensure that wheel bolts and studs meet the strength and durability requirements for securely fastening automotive wheels. The standard specifies various tests and criteria for evaluating the metallurgical and mechanical properties of these components.

Some of the tests specified in GMW 16535 include:

• Tensile strength test: This test measures the maximum amount of tensile stress a bolt or stud can withstand before breaking.
• Hardness test: This test measures the material's resistance to indentation or scratching.
• Charpy impact test: This test measures the energy absorbed by the material during an impact.
• Fatigue test: This test evaluates the ability of the bolt or stud to withstand repeated cycles of loading and unloading without deterioration.
• Torque test: This test measures the amount of torque required to tighten the bolt or stud to a certain level.

The standard also specifies various acceptance criteria for these tests, such as minimum values ​​for tensile strength and hardness, and maximum values ​​for fatigue life.

Compliance with GMW 16535 is important to ensure the safety and reliability of automotive wheels. Wheel bolts and wheel studs that do not meet the required strength and durability requirements can cause wheel separation, which can result in accidents and injury.

EUROLAB assists manufacturers with GMW 16535 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.