Rigging Hardware Testing: Sample Results and Traceable Records

For buyers of rigging hardware, a test result is useful when it can be matched to the correct product, size and specimen. Xiangsheng Rigging maintains in-house testing records and third-party reports to support discussions about eye bolts, shackles, turnbuckles and chains.

What a Test Record Shows

Testing records may include specimen identification, test date, force and displacement data, yield values, maximum force and observations after testing. These details need to be read together with the specimen dimensions, material and test conditions.

For example, the records described in this article include specimen 60-1#, with a recorded yield force of 49.12 kN and maximum force of 81.07 kN, and specimen 59-1#, with upper and lower yield forces of 27.37 kN and 26.96 kN and maximum force of 40.55 kN. These are individual specimen results; they are not working load ratings for other products.

Using Destructive Tests to Review Product Quality

Destructive tests are performed on selected specimens. The force-displacement curve and the condition of the tested specimen provide information for reviewing product performance and production processes.

A fracture at an eye bolt thread, a shackle bow or a chain link requires investigation. The fracture location alone does not establish the cause; material, dimensions, manufacturing history and test setup must also be reviewed before conclusions are drawn.

Reading Unusual Values Correctly

Some historical printouts show 9999.99 MPa in strength fields alongside a cross-sectional area of 0.00 mm². Those strength entries should not be presented as verified material properties. The original input data and calculation settings need to be checked before a strength value is reported.

Force and stress are different measurements. A force reading in kN should not be described as tensile strength in MPa without the corresponding valid cross-sectional area and calculation.

Third-Party Reports and Their Scope

The company records referenced in the original article include the following reports from the testing centre of Qingdao Municipal Mechanical Research Institute Co., Ltd. Buyers should request the complete reports to verify the sample descriptions, methods, results and scope.

• QDJXS-HX-019-0060: eye bolts; samples submitted on 11 December 2025 and testing completed on 12 December 2025.

• QDJXS-WL-020-0035: Italian-type turnbuckles in M6 and M12; samples submitted on 5 August 2026 and testing completed on 8 August 2026.

Match the Documentation to the Order

• Check that the product type, size, material and specimen identification match the documentation being reviewed.

• Use each report only within its stated scope. Results for one size or specimen do not establish the performance of another.

• Distinguish sample destructive testing from inspection or testing of every supplied unit.

• Confirm the inspection requirements and documents needed for the order before production and dispatch.

Request Product-Specific Information

If you are sourcing eye bolts, shackles, turnbuckles or chains, contact our sales team with the product specification, intended application and documentation requirements. Our team can review which testing records and reports are available for the requested item.