Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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A519 4130 4140 Oil Well Drilling Pipe , Oilfield Drill Pipe for Oil Exportation
Description
We introduce high-strength A519 4130/4140 Oil Well Drilling Pipes, engineered for extreme downhole conditions and international oil exportation projects. Manufactured in strict compliance with ASTM A519 standards, these seamless chromium-molybdenum alloy steel pipes deliver superior mechanical properties, including exceptional tensile strength (≥813 MPa for 4130, ≥950 MPa for 4140), outstanding impact toughness, and excellent fatigue resistance.
Ideal for drill rods, tool joints, casings, and heavy-weight drill pipes, our products are tailored to withstand high-pressure, high-temperature (HPHT) environments and corrosive well conditions. The precise chemical composition—4130 (Cr: 0.80-1.10%, Mo: 0.15-0.25%) and 4140 (Cr: 0.80-1.10%, Mo: 0.15-0.25%)—ensures enhanced hardenability, wear resistance, and structural integrity under dynamic loads.
Specification
| Parameter | Details |
|---|---|
| Material Grade | 4130, 4140 |
| Standard | ASTM A519 |
| Outer Diameter (OD) | 30 - 140 mm |
| Wall Thickness (WT) | 3 - 20 mm |
| Delivery Condition | +N, +SR, QT |
Chemical Composition
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | B |
| 4130 | 0.28-0.33 | 0.15-0.35 | 0.40-0.60 | ≤0.040 | ≤0.040 | 0.80-1.10 | 0.15-0.25 | |
| 4140 | 0.38-0.43 | 0.15-0.35 | 0.75-1.00 | ≤0.040 | ≤0.040 | 0.80-1.10 | 0.15-0.25 | |
| 45MnMoB | 0.43-0.48 | 0.17-0.37 | 1.05-1.35 | ≤0.020 | ≤0.015 | 0.20-0.25 | 0.001-0.005 | |
| 1541 | 0.36-0.44 | - | 1.35-1.65 | ≤0.040 | ≤0.050 | |||
| 30CrMnSiA | 0.28-0.34 | 0.90-1.20 | 0.80-1.10 | ≤0.020 | ≤0.015 | 0.80-1.10 |
Mechanical Properties
| Steel Grade | Deliver Condition | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness(HRC) |
| 4130 | + SR | ≥813 | ≥690 | ≥15% | ≥24 |
| 4140 | QT | ≥950 | ≥850 | ≥14% | 28 - 33 |
| 45MnMoB | + N | ≥790 | ≥600 | ≥14% | - |
| 1541 | + SR | ≥813 | ≥690 | ≥15% | ≥24 |
| 30CrMnSiA | QT | ≥850 | ≥750 | ≥14% | 26-31 |
Features
High Strength-to-Weight Ratio: Provides necessary load-bearing capacity while managing the weight of the drill string.
Exceptional Toughness: Superior resistance to impact and shock loads encountered during drilling, tripping, and in doglegs, minimizing the risk of catastrophic failure.
Outstanding Fatigue Resistance: Withstands the cyclic bending and rotational stresses in the drill string, significantly extending service life.
Good H2S Resistance (Limited S & P): Low sulfur and phosphorus content offers
Packing
Standard Export Packing: Bundles with plastic end caps and wooden box package
Application
Drill Pipes & Tool Joints: Core material for high-strength drill string components.
Casing Tubing: Used in sections requiring enhanced mechanical performance.
Couplings & Subs: Critical connections in downhole assemblies.
Core Barrels: Inner and outer tubes for drilling core samples.
Mandrels & Valves: Components for wellhead and drilling tools.
