34CrMo4 4130 Oil Well Pipe for Critical Applications in the Oil and
Gas Industry
Description
We introduce premium-grade 34CrMo4 4130 Oil Well Pipe, engineered to
meet the most demanding requirements in critical oil and gas
applications. Manufactured to comply with both European (34CrMo4)
and American (AISI 4130) material standards, this seamless
chromium-molybdenum alloy steel pipe delivers exceptional
performance where failure is not an option. The precise chemical
composition, featuring optimal levels of chromium (0.90-1.20%) and
molybdenum (0.15-0.25%), ensures superior mechanical properties
including minimum tensile strength of 813 MPa and yield strength of
690 MPa, making it ideal for high-stress downhole environments.
These pipes undergo specialized heat treatment processes including
quenching and tempering (+QT) to achieve enhanced microstructural
homogeneity and excellent impact toughness at various temperature
ranges. Available in sizes from 30mm to 139.7mm OD with wall
thicknesses of 3-19mm, they are specifically designed for critical
applications such as high-pressure well completions, sour service
environments, deepwater drilling operations, and extended-reach
horizontal wells. The material's excellent resistance to sulfide
stress cracking and superior fatigue strength ensure reliable
performance in H2S-containing environments and high-cycle loading
conditions.
Specification
| Product Name | Seamless Alloy Steel Pipe for Oill Well Drilling |
| Material | 4130, 4140, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 |
| Standard | ASTM,DIN,GB,JIS |
| Wall Thickness | 3-19mm |
| Outer Diameter | 30-140mm |
| Packing | Bundle, or with all kinds of colors PVC or as your requirements |
| Surface | Black painting varnish paint, anti rust oil |
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
High Straightness & Low Eccentricity
Low Residual Stresses
Superior Mechanical Properties
Corrosion Resistance
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.
Inspection
Surface Quality Assessment
Dimensional Verification
Ultrasonic Examination
Magnetic Particle Inspection
Radiographic Analysis
Mechanical Property Verification
Tensile Property Analysis
Hardness Assessment
Impact Resistance Evaluation
Spectrochemical analysis
Application
Aerospace: Employed in airframe structures, undercarriage systems,
and propulsion system support elements.
Automotive: Incorporated into safety frame constructions, vehicle
frameworks, and shock-absorbing assemblies.
Oil and Gas: Optimized for borehole drilling strings, well casings,
and extraction conduits under extreme pressure conditions.
Mechanical Engineering: Adopted for numerous high-performance parts
subject to intense mechanical demands.
Construction: Applied in lifting apparatus, architectural span
supports, and other load-bearing infrastructures demanding superior
strength.
