Sinker Bar is one rod with lifting neck and connected in the bottom of the sucker rod string, which is designed to increase the weight and stability of the sucker rod string. We can design and supply the sinker bar in different grades (C, K and D) and length according to API 11B Specification.
| Sinker Bar Mechanical Properties and Material | |||
| Grade | Tensile Strength Rm (Mpa) | Material | |
| C | ≥621 | Carbon Steel(AISI 10XX series steel or equivalent international series steel) | |
| K | ≥621 | Alloy Steel(AISI 43XX or 46XX series steel or equivalent international series steel) | |
| D | ≥793 | Alloy Steel(AISI 41XX or equivalent international series steel) | |
| HS | ≥965 | Alloy Steel(AISI 41XX or equivalent international series steel) | |
