Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
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AISI 4130 Oil Well Drill Pipe , Seamless Alloy Steel Pipe for Nonferrous Metal Mining Projects
Description
Our AISI 4130 (30CrMo) seamless alloy steel pipes are engineered to meet the rigorous demands of oil and gas drilling operations. Manufactured in strict compliance with GB/T 9808 and ASTM A519 standards, these pipes deliver exceptional strength, toughness, and fatigue resistance, making them ideal for critical applications such as drill pipes, casings, and tool joints.
With precise chemical composition control and advanced heat treatment processes, our pipes ensure superior microstructural integrity, low residual stresses, and high dimensional accuracy. They are rigorously tested for non-destructive quality assurance, guaranteeing reliability in the most challenging downhole environments.
Specification
| Parameter | Details |
|---|---|
| Material Grade | 30CrMo (AISI 4130) |
| Standard | GB/T 9808, ASTM A519 |
| Outer Diameter (OD) | 4-219 mm |
| Wall Thickness (WT) | 0.5-20 mm |
| Surface Treatment | Black painting, 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 |
| 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 |
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 |
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
Mine blasting, water well drilling, geothermal wells drilling, fore poling, coal and nonferrous metal mining projects, etc.
Packing
Standard Export Packing: Steel-strapped bundles with plastic end caps and waterproof wrapping.
Customized Options: Wooden crates or pallets available for extra protection.
Marking: Each bundle tagged with grade, size, heat number, and weight for full traceability.
Shipping: Optimized for global logistics via sea or air freight.
