A519 4130 Oil Well Pipe , Seamless Alloy Steel Pipe for Demanding Downhole Environments
Description
We present A519 4130 Oil Well Pipe, a superior-grade seamless alloy steel pipe specifically engineered to excel in the most challenging downhole environments. Manufactured in strict compliance with ASTM A519 standard, this chromium-molybdenum alloy steel pipe delivers exceptional performance where conventional materials fall short.
Our 4130 alloy pipes feature an optimal chemical composition with 0.28-0.33% carbon, 0.80-1.10% chromium, and 0.15-0.25% molybdenum, providing outstanding mechanical properties including minimum tensile strength of 813 MPa and yield strength of 690 MPa. These characteristics ensure reliable operation under extreme conditions of high pressure, high temperature, and corrosive downhole environments.
Specification
| Parameter | Details |
| Material Grade | 4130, 34CrMo4, 30CrMo |
| Standard | ASTM A519 |
| Outer Diameter (OD) | 30 - 140mm |
| Wall Thickness (WT) | 3 - 20mm |
| Surface Treatment | Anti-rust oil, or as customer’s requirements |
Delivery Condition
+SR (Stress Relieved): Ideal for machining, ensures low residual stresses and high straightness.
+N (Normalized): Enhances microstructural uniformity and toughness.
+QT (Quenched & Tempered): Provides superior strength and hardness for extreme downhole conditions.
Chemical Composition
| Steel Grade | C | Si | Mn | P | S | Cr | Mo |
| 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 |
Mechanical Properties
| Steel Grade | Deliver Condition | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness(HRC) |
| 4130 | + SR | ≥813 | ≥690 | ≥15% | ≥24 |
Features
Excellent Microstructure: Uniform grain structure for consistent performance under high stress.
High Straightness & Low Eccentricity: Precision cold drawing ensures tight tolerances.
Low Residual Stresses: Stress-relieved treatment minimizes distortion during machining.
Superior Mechanical Properties: High tensile strength (≥813 MPa) and yield strength (≥690 MPa).
Corrosion Resistance: Chromium-molybdenum alloy composition resists downhole corrosive environments.
Application
Drill Rod Tube
Casing Tube
Packing
Steel-strapped bundles with plastic and wooden case
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