National Metallurgical Academy of Ukraine (Dnepr, Ukraine):

A. V. Ivchenko, Cand Eng., Senior Researcher, e-mail: ivchenkoaleksv@gmail.com

The analysis of testing methods for steel rod fasteners in accordance with GOST ISO 898-1-2014 has been performed. It is shown that the control of mechanical properties according to this standard is sometimes ineffective, which leads to the destruction of products during the installation of metal structures. This can be explained by the imperfection of existing control methods, as well as by the fact that when testing fasteners, the technology of their manufacture and preparation for use is not taken into account. Other methods of monitoring the mechanical properties of rod fasteners, both delivery at the manufacturer and input at the consumer, have been proposed and tested, which should be carried out on the basis of new developments in product testing, taking into account the technology from manufacture and use, as well as taking into account the phenomena of deformation aging. The new methods imply the assessment of the plastic properties of full-size products, control of the impact work using special semi-natural samples, control of the tendency to brittle fracture taking into account the structural state of the threaded section of the product, and control of the tendency to deformation aging. All the proposed methods simplify the testing process and increase the reliability of the control of the mechanical properties and reliability of steel rod fasteners.

1. GOST ISO 898-1–2014. Mechanical properties of fasters made of carbon steel and alloy steel. (ISO 898-1:2013, IDT). Part 1. Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread. Introduced: 01.01.2017.
2. Goritskiy V. М., Guk V. О. Sotskov N. I. Quality problems of 5.8 strength class bolts for building structures. Krepezh, kley, instrument i… 2018. No. 1. pp. 22–26.
3. Goritskiy V. М., Khromov D. P. The quality of steel bolted connections of objects designed and built by foreign firms. Promyshlennoe i grazhdanskoe stroitelstvo. 2000. No.5. pp. 44–45.
4. Moyseychik Е. А. Performance of tensioned high-strength bolts in steel structures and their susceptibility to delayed failure. Vestnik MGSU. 2014. No. 11. pp. 58–67.
5. Potapov V. N., Mishik B. S. Evaluating the performance of tensile bolts in steel structures. Promyshlennoe stroitelstvo. 1982. No. 5. pp. 23–25.
6. Gul Yu. P., Ivchenko A. V., Ambrazhei M. Yu. Assessment of actual structural strength of high-strength bolts on the basis of acceptance-test data. Steel in Translation. 2011. Vol. 41. No. 9. pp. 765–769.
7. Semenov A. A., Ivchenko A. V., Gul Yu. P., Perchun G. I., Chmeleva V. S. et. al. Method of rod-shaped thread fasteners plastic properties determining. Patent RF No. 2622487. Applied: 31.03.2016. Published: 15.06.2017. Bulletin No. 17.
8. Gul Yu. P., Ivchenko A. V., Kondratenko P. V. The method of determining the mechanical properties of rod threaded fasteners. Patent UA No. 114904. Published: 27.03.17. Bulletin No. 6.
9. BS 4449:2005. Steel for the reinforcement of concrete. Weldable reinforcing steel. Bar, coil and decoiled products. Specification. Published: 2005.
10. GOST 32028–2016. Reinforcing rolled products for reinforced concrete constructions. Specifications. Introduced: 01.01.2018.
11. SNiP II-23/81. Steel constructions. Moscow: GUP TsPP, 2003. 90 p.
12. Ivchenko A. V. On rationing of upper limits of strength characteristics and toughness requirements for bolts of 5.8 strength class. Stal. 2018. No. 4. pp. 36–39.
13. GOST 12004–81. Reinforcing-bar steel. Tensile test methods. Introduced: 01.07.1983.
14. Odesskiy P. D., Vedyakov I. I. Steel in building metal structures: monograph. Moscow: Metallurgizdat, 2018. 906 p.
15. ISO 898-1:2013. Mechanical properties of fasteners made of carbon steel and alloy steel. Part 1. Bolts, screws and studs with specified strength classes. Coarse thread and fine pitch thread. Published: 14.01.2013.
16. Ivchenko O. V., Machuska N. D., Zaytseva T. O. Sample for testing rod threaded fasteners for impact bending. Patent UA No. 128283. Applied: 29.03.2018. Published: 10.09.2018. Bulletin No. 17.
17. Ivchenko O. V., Perchun G. I., Kondratenko P. V. Chmelyova V. S., Vasilenko V. M. Test method for impact bending of rod threaded fasteners. Patent UA No. 144064. Published: 25.08.2020. Bulletin No. 16.
18. Rybin V. V. Thread angle and savings calculation. Krepezh, kley, instrument i … 2015. No. 3. pp. 36–37.
19. Dorofeev A. V. Studs is the reason for fall of a pillar. Krepezh, kley, instrument i … 2015. No. 3. pp. 38–39.
20. Moyseychik Е. А. Strength of tensioned bolts of joints of building structures. Mechanical engineering: Republican interdepartmental collection of scientific papers. Minsk: Belorusskiy natsionalnyi tekhnicheskiy universitet. 2007. Iss. 23. pp. 226–233.
21. Silvestrov E. A., Chibryakov G. G., Moyseychik Е. А. Strength of bolts of nodal joints of the MarKhI type structures at low temperatures. Reliability of structures in extreme conditions: collection of articles. Yakutsk: Izdatelstvo YaGU, 1984. pp. 77– 82.
22. Augustyn J., Sledziewski Е. Awarie konstrukcji stalowych. Translation from Polish. Moscow: Stroyizdat, 1978. 183 p.
23. Belyaev S. V. Study of strength of bolts at tension with skewness. Zavodskaya laboratoriya. 1945. No. 11. pp. 604–623.
24. Ivchenko O. V., Raber L. M., Bilodidenko S. V., Perchun G. I., Gul Yu. P. et. al. Method of express control of steel rod threaded fasteners on susceptibility to brittle fracture. Patent UA No. 137693. Published: 11.11.2019. Bulletin No. 21.
25. Babich V. K., Gul Yu. P., Dolzhenkov I. E. Deformation aging of steel. Moscow: Metallurgiya, 1972. 320 p.
26. STO NOSTROY 2.10.76–2012. Metal building constructions. Bolted connections. Rules and control of installation, requirements to results of works. Moscow, 2013. 57 p.
27. Ivchenko O. V., Perchun G. I., Gul Yu. P., Kondratenko P. V. Chmelyova V. S., Method of tensile testing of cold-formed rod threaded fasteners. Patent UA No. 144063. Published: 25.08.2020. Bulletin No. 16.
28. Gul Yu. P., Perchun G. I., Kondratenko P. V., Chmeleva V. S., Ivchenko A. V. Heat Treatment to Slow Strain Aging in Threaded Steel Bolts. Steel in Translation. 2019. Vol. 49. No. 2. pp. 137–140.