Commen materials for high strength bolt, studs, nut and washer are listed in below form. But Anyang Longteng are able to conduct production for other materials, please send the drawings and technical documents to our team.
Heat Treatment procedures for high strength bolt, stud, nut and washer should be quenching and tempering(QT); Temperature for tempering should be according to GB/T 3098.1, or ISO 898-1.
Materials Requirements for Bolt
| Item | Material | Standard |
| Bolt, stud Gr.10.9 | 42CrMo, 40CrNiMo, 35CrMo,35VB | GB/T 3077 |
| SCM440, SCM435 | JIS G4053 | |
| B7 | ASTM A193 | |
| Bolt, stud Gr.8.8, D≥16 | 42CrMo, 35CrMo,35VB | GB/T 3077 |
| SCM440, SCM435 | JIS G4053 | |
| B7 | ASTM A193 | |
| Bolt, stud Gr.8.8, D＜16 | Acc.to GB/T 3098.1, ISO 898-1 | |
Material Requirements for accessories
| Nut Gr.10, d≥36 | 42CrMo, 35CrMo | GB/T 3077 |
| Nut Gr.10, d＜36 | 45/45K | |
| Nut Gr.8, d≥16 | 45/45K | |
| Nut Gr.8, d＜16 | Acc.to GB/T 3098.2, ISO 898-2 | |
| Washer | 45 | GB/T 699 |
Post time: Mar-04-2021