SAE USCAR-8 Standard Test for Grain Flow Pattern for Bolts, Screws and Studs

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of SAE USCAR-8 testing. This specification covers grain flow pattern requirements on head bolts, screws, and studs.

Cap application in bolt, screw, or stud fabrication determines grain flow pattern, but is also heavily influenced by fastener and tool design as well as cold forging setup. The use of tool design simulation software is recommended and is a widely used practice that provides reliable forging estimates for superior grain flow quality.

With the processing of the material in the head part, it becomes stronger, which causes the stress concentration to increase. In addition to product reliability, a properly constructed semi-product set with a matched fiber arrangement allows for cost reduction from excessive tool wear.

The technology currently used enables small and precise shapes to be obtained in the cold forming process. These processes require simulation support to accurately predict the direction and potential motion of the material.

He showed that this standard not only optimizes the technology understood by changing the tool geometry, but also reorganizes the technology from waste forging to waste-free forging. The development of this standards-based technology has been used as a tool to reduce time in the production of complex shaped bolts and to minimize the costs of starting the production of a new element.

EUROLAB assists manufacturers with SAE USCAR-8 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.