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.
