The SGS report of tensile test for self drilling hollow anchor bar of Sinorock
The following is a copy of SGS report which tells the result of tensile test for self drilling hollow anchor bar.
tensile test result of Sinorock self-drilling anchor hollow bar
The results fully achieve the client’s requirements:
- The test of anchor bars is performed full size.
- The minimum tensile strength is 237 MPa above the minimum yield strength. It is better than the specified 25 000 psi (172 MPa) at least by F432.
- Strength and ductility performance are up to the standards simultaneously.
In fact, Sinorock has a range of standard self-drilling anchor rods. These rods are special treated to gain high resistance capacity. That means:
- For a same cross section of steel, the load bearing capability of Sinorock anchor rods is up to 40% higher, allowing for a larger nailing grid or a smaller size (diameter) of bar rods. Project cost saving.
- For a same tensile strength, our rods are lighter. Labor cost saving.
In the end of tensile test, if the strain increased even more, eventually the object will neck. During elastic and plastic deformation the entire object’s cross-sectional area decreases slightly, but at the onset of necking the weakest part of the material suddenly becomes noticeably thinner. It takes less force to finish pulling the steel pipe apart.
Furthermore, you may notice the Ductility Agt parameter in the SGS report.
