API 11b Grade D 4130 Rod Sucker RodSucker rods are designed for transmission of translational or rotational motion from ground drive to the well pump for oil extraction. The rods are round cross-section bars whose ends are provided with upset heads and thread..
| Sucker Rod Weight List | |||||||
| Size | 5/8" | 3/4" | 7/8" | 1" | 1-1/8" | 1-1/4" | 1-1/2" |
| kg/m | 1.68 | 2.4 | 3.2 | 4.2 | 5.3 | 6.4 | 9.5 |
| Mechanical Property OF Steel Polished Rod | |||||||||||
| GRADE | Minimum Yield Strength(0.2% Residual Deformation) | Minimum Tensile Strength | Maxmum Tensile Strength | Elongation200mm% | Reduction of Area Z% | HRC | HB | Fatigue Life | |||
| psi | MPa | psi | MPa | psi | MPa | ≥13 | ≥50 | ≥1.0X106 | |||
| C | 60000 | 414 | 90000 | 621 | 115000 | 793 | ≥13 | ≥50 | |||
| D | 85000 | 586 | 115000 | 793 | 140000 | 965 | ≥13 | ≥50 | |||
| KD | 85000 | 590 | 115000 | 795 | 140000 | 965 | ≥13 | ≥50 | |||
| H | 115000 | 795 | 140000 | 965 | 173339 | 1195 | ≥13 | ≥45 | |||
| EHL | / | / | 188500 | 1300 | 217500 | 1500 | / | / | ≥50 | ≥320 | ≥2.5X106 |
| Note: When the minimum yield strength cannot be measured, it should be considered to be processed into standard sample and install extensometer to measure. | |||||||||||
| a It is generally made of high quality carbon steel, which can reach the mechanical properties of the table. b A molybdenum steel (but not limited to this type of steel) is generally used, and the effective heat treatment can achieve the mechanical properties of this table. | |||||||||||
| SN | Normal size in(mm) | Dia. of coated rod (mm) | Wrench section width (mm) | Wrench section Length (mm) | OD of Male thread step (mm) | Nipple neck length of ascension(mm) |
| 1 | 5/8(16) | 19 | 27 | 28 | 37 | 127 |
| 2 | 3/4(19) | 22 | 29 | 28 | 43 | 127 |
| 3 | 7/8(22) | 25 | 29 | 28 | 45 | 127 |
| 4 | 1(25) | 28 | 39 | 28 | 55 | 127 |
| 5 | 1 1/8(29) | 32 | 43 | 37 | 60 | 127 |
The API 11b Grade D sucker rod, manufactured from chromium-molybdenum 4130 steel, is a high-strength workhorse for demanding artificial lift applications. This grade offers superior tensile strength and fatigue resistance compared to lower grades, making it ideal for deep wells or high-fluid-volume production. Its robust construction helps withstand the severe stresses of the cyclic pumping cycle, minimizing failures and extending run life. Compliance with the API 11b standard ensures consistent quality, dimensional accuracy, and reliable performance in corrosive environments, contributing to efficient and uninterrupted oil production.
