Test summary
Independent tensile test of a TUFF class 10.9 bolt
In an independent test by Element Materials Technology, Singapore (report T24-56832R, November 2024), one TUFF M22 class 10.9 HSFG bolt reached 1,221 MPa tensile strength against the ISO 898-1 minimum of 1,040 MPa (17.4% above the minimum), with hardness 33.6 HRC and fracture in the free thread.
Result
- LaboratoryElement Materials Technology, Singapore.
- ReportT24-56832R, November 2024.
- SampleOne TUFF M22 class 10.9 HSFG bolt.
- Tensile strength1,221 MPa measured. ISO 898-1 minimum for class 10.9: 1,040 MPa. 17.4% above the minimum.
- Hardness33.6 HRC.
- FractureIn the free thread.
- ScopeThis is one sample; results vary by size, grade and lot, and the test certificate of each supplied lot governs.
Product page: Heavy hex structural bolt. Questions on testing: FAQ.
About the maker
- Fasteners since 1996Pioneer Nuts & Bolts Pvt. Ltd., brand TUFF®. Forging, heat treatment, machining and finishing in-house.
- 50 yearsMetallurgy and heat treatment, since 1976.
- IATF 16949:2016Certified quality management system.
- NABL labIn-house laboratory accredited by NABL to ISO/IEC 17025:2017 for the tests in its scope. Lots tested to the applicable standard.
- Japanese collaborationTechnical collaboration with Japanese fastener companies.
- 150+ testimonialsMore than 150 customer testimonials.