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.
