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Help CenterAPI Spec 11b Grade C, D, K Sucker Rods
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GRADE D CARBON
Designed for non-corrosive or effectively inhibited wells with moderate loads. Manufactured in 4130 Mod. Steel.
GRADE D ALLOY
Designed for moderate to high loads in non-corrosive or effectively inhibited wells. Manufactured in AISI 4142 steel.
GRADE KD
Designed for corrosive wells where inhibiting is recommended, with moderate loads. Manufactured in AISI 4720 Mod. Steel.
GRADE D SPECIAL
Designed for corrosive wells with high and moderate loads where inhibition is recommended. Manufactured in AISI 4330 Mod. Steel.
| API Grades | ||||
| Grade D | ||||
| D Carbon | D Alloy | KD | D Special | |
| Steel | 4130 | 4142 | 4720 | 4330 |
| C | 0.26-0.33 | 0.38-0.45 | 0.19-0.23 | 0.29-0.37 |
| Mn | 0.40-0.70 | 0.80-1.00 | 0.80-1.05 | 0.70-0.95 |
| Si | 0.17-0.37 | 0.15-0.35 | 0.15-0.35 | 0.15-0.35 |
| Ni | 0.30Max | 0.45Max | 0.90-1.20 | 1.65-2.00 |
| Cr | 0.80-1.10 | 0.80-1.10 | 0.80-1.05 | 0.80-1.10 |
| Mo | 0.15-0.25 | 0.15-0.25 | 0.24-0.30 | 0.20-0.30 |
| MECHANICAL PROPERTIES | ||||
| YS(Ksi) | 85Min | 85Min | 85Min | 85Min |
| UTS(Ksi) | 115-140 | 115-140 | 115-140 | 115-140 |
| HEAT TREATMENT | ||||
| Quenched | Normalized | Normalized | Normalized | |
| Tempered | Tempered | Tempered | Tempered | |
| Rod OD | 5/8″, 3/4″, 7/8″, 1″,11/8″ | |||
| (mm) | (15.88), (19.05), (22.23), (25.40) , (28.58) | |||
| Rod Length | 25', 30' (+/- 2.0″per API requirement) | |||
| (m) | (7.62), (9.14) (+/- 50.80mm per API requirement) | |||
Technical Parameters of Sucker Rod
| Size | Rod D.(in) | Thread D.(in) | Length of pin(mm) | Length of wrench(mm) | Width of Wrench (mm) | Length of the rod(ft) |
| 5/8 | 5/8 | 15/16 | 31.75 | ≥ 31.8 | 22.20 | 2 / 4 /6 / 8 /10/25/30 |
| 3/4 | 3/4 | 1-1/16 | 36.50 | ≥ 31.8 | 25.40 | 2 / 4 /6 / 8 /10/25/30 |
| 7/8 | 7/8 | 1-3/16 | 41.28 | ≥ 31.8 | 25.40 | 2 / 4 /6 / 8 /10/25/30 |
| 1 | 1 | 1-3/8 | 47.63 | ≥38.1 | 33.30 | 2 / 4 /6 / 8 /10/25/30 |
| 1-1/8 | 1-1/8 | 1-9/16 | 53.98 | ≥41.3 | 38.10 | 2 / 4 /6 / 8 /10/25/30 |
Mechanical Property:
| No. | Grade | Tensile Strength Rel(Mpa) |
Yield Strength Rm(Mpa) |
Percentage Elongation A(%) | Contraction Percentage Of Area Z(%) |
| 1 | C | 620-795 | ≥415 | ≥13 | ≥50 |
| 2 | K | 620-795 | ≥415 | ≥13 | ≥60 |
| 3 | D | 795-965 | ≥590 | ≥10 | ≥50 |
| 4 | KD | 795-965 | ≥590 | ≥10 | ≥50 |
| 5 | HL | 965-1195 | ≥795 | ≥10 | ≥45 |
| 6 | HY | 965-1195 | -- | -- | -- |
1. Sucker Rod, Type Solid, BCP use, Diameter 1-1/4in, length 25ft, Size and connection type 1-9/16in cylindrical, connection designs Spike x Box, Neck type Reduced diameter, Neck class T, Material Alloy Steel 4330, Minimal stress-strain 115000 PSI, Grade D Special, standard manufacturing API 11B-07/1998
Coupling Material:5140 Grade T
2. Details: Sucked Rod, Type Solid, BCP use, Diameter 1-1/4in, length 25ft, Size and connection type 1-9/16in cylindrical, connection designs Spike x Box, Neck type Reduced diameter, Neck class T, Material Alloy Steel 4330, Minimal stress-strain 115000 PSI, Grade D Special, standard manufacturing API 11B-07/1998
Coupling Material:5140 Grade T
3. Details: Sucked Rod, Type Solid, BCP use, Diameter 1-1/2in, length 25ft, Size and connection type 1-9/16in cylindrical, connection designs Spike x Box, Neck type Reduced diameter, Neck class T, Material Alloy Steel 4330, Minimal stress-strain 115000 PSI, Grade D Special, standard manufacturing API 11B-07/1998
Coupling Material:5140 Grade T
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Our products mainly include:
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3. Sucker Rod
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Add: No.224, Nan Er Road, Dongying, Shandong, China
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Email: yudan@erui.com
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