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Are dedicated-grade fully threaded studs stronger than commercial-grade hex head bolts? What this passage in the standard means is that the strength grade order is: fully threaded studs > double-headed studs > hex head bolts? How to prove it?
What this sentence means is that, at the same strength grade, fully threaded studs designed for specialized use have higher strength than hex head bolts of commercial grade. The proof method is as follows: 1. Check the strength grade standards: According to relevant standards such as ISO 898-1, GB/T 3098.1, etc., the strength grades of different types of bolts are classified based on their performance indicators. 2. Comparison of performance indicators: The performance indicators of dedicated-grade fully threaded studs are compared with those of commercial-grade hex head bolts; if the performance indicators of the fully threaded studs are higher than those of the hex head bolts, it can be concluded that the fully threaded studs have greater strength than the hex head bolts. 3. Conduct experimental verification: To more scientifically prove that full-threaded studs have higher strength than hex head bolts, experimental verification can be carried out. For example, under the same loading conditions, the load values at which fully threaded studs and hex head bolts fail are tested, and the differences between the two are compared in order to determine which type of bolt has higher strength. It is important to note that selecting the appropriate type of bolt and adhering to standard specifications are key to ensuring the strength of bolted connections. In practical applications, the appropriate type of bolt should be selected as needed, and it must be installed and used in accordance with standard specifications. .