$15.00
0A steel for high-strength bolts of a strength class over 12.9, which have excellent delayed fracture resistance, has been newly developed. It offers increased fracture toughness and decreased hydrogen through the addition of Mo, Ti, V and Ni, which improved delayed fracture resistance. This was accomplished through the refinement of grain size and the introduction of a hydrogen-trapping site by the precipitation of many fine Mo-Ti-V type complex carbides (less than 50 nm).
0A steel for high-strength bolts of a strength class over 12.9, which have excellent delayed fracture resistance, has been newly developed. It offers increased fracture toughness and decreased hydrogen through the addition of Mo, Ti, V and Ni, which improved delayed fracture resistance. This was accomplished through the refinement of grain size and the introduction of a hydrogen-trapping site by the precipitation of many fine Mo-Ti-V type complex carbides (less than 50 nm).
| Author(s) | Yuichi Namimura, Nobuhiko Ibaraki, Wataru Wurushihara and Takenori Nakayama, Kobe Steel, Ltd., Japan |
|---|---|
| Publication/Event/Pages | Paper presented at WAI 72nd Annual Convention, Chicago, USA. Paper published in Wire Journal International, Jan. 2003, pg. 62. |
| Year | 2002 |
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