Bolt Testing


Full Size Tension Testing Bolts—This testing process is a straight axial tensile testing of the bolt without the use of a controlled testing section (Machined location). The bolt being tested is pulled in the as used condition. To meet the requirements of this test, the bolt shall support a load prior to fracture not less than the minimum tensile strength specified in the product specification for the applicable size, grade, and thread series. These call out can be in straight loads or cross-sectional loads. When testing full size bolts, yield strength and elongation properties are not tested.

Wedge Tension Testing of Bolts—This testing process is to determine the bolt still meets ultimate load requirements of the bolt with placement of a wedge under the bolt head. Wedge angle are dependent on the size of the bolt being tested and is determine in accordance with table 2 of ASTM-F-606.The bolt shall be tension tested to fracture. To meet the requirements of this test, the bolt shall support a load prior to fracture not less than the minimum tensile strength specified in the product specification for the applicable size, grade, and thread series.  

Tension Testing of Machined Test Specimens—This testing process requires the bolt have a controlled section machined in the bolt. Requirements for passing testing of machined location gives all properties of the bolt being tested which includes, Yield Strength, Elongation, and Ultimate Strength. To meet the requirements of this test, the bolt shall meet minimum tensile strength, yield strength, and elongation properties specified in the product specification for the applicable size, grade, and thread series.