Minimum Breaking Strength (MBS) is the minimum force at which a component is expected to break under a defined test method. Working Load Limit (WLL) is an allowable working value established using an appropriate safety factor. They are not interchangeable.
Why buyers must separate MBS and WLL
A component marked with an MBS does not automatically have a universal WLL. The usable system value depends on the relevant standard, application, loading direction and manufacturer instructions.
Questions for suppliers
- Which test method defines the stated strength?
- Is the value for major axis, minor axis or open gate?
- How many samples were tested?
- What was the failure mode?
Related action
Prepare your project requirements, then submit the drawing and target parameters for engineering review.