4140 vs 4130 Oilfield Drilling Pipe Performance Comparison – Core Advantages of 4140 Grade​​

In the oilfield drilling sector, steel selection directly determines the ​​load-bearing capacity, wear resistance, and long-term reliability​​ of drill pipes and casings. Below is a comparison of ​​key parameters between 4140 and 4130 grades​​, highlighting the ​​core advantages of 4140-grade drilling pipes​​ to help you make an informed choice.

​​I. Core Parameter Comparison: Why 4140 Outperforms​​

​​II. Four Core Advantages of 4140-Grade Drilling Pipes​​

​​1. Extreme High Strength: Greater Load Capacity, Higher Safety​​

4140 grade achieves its superior performance through ​​higher carbon content (0.38–0.43) and alloy reinforcement (Cr 0.80–1.10, Mo 0.15–0.25)​​. The ​​quenched & tempered (QT) process​​ delivers a tensile strength of ​​≥950 MPa and yield strength of ≥850 MPa​​—​​17% and 23% higher than 4130​​, respectively. This enables it to withstand greater downhole pressures, tension, and torque, making it ideal for ​​high-pressure deep wells, complex formations (e.g., hard rock, fault zones)​​, and reducing risks of fractures or deformations for safer operations.

​​2. Superior Wear Resistance: Extended Lifespan, Lower Maintenance Costs​​

With a hardness range of ​​28–33 HRC (vs. 4130’s ≥24 HRC)​​, 4140’s fine-quenched and tempered martensitic microstructure significantly enhances surface durability. It effectively resists ​​drill cuttings impact, formation friction, and casing abrasion​​, minimizing wear-induced thinning or leaks. This extends the service life of drill pipes/casings, reducing downtime and replacement costs.

​​3. Balanced Toughness: Impact Resistance Without Brittleness, Adapting to Complex Conditions​​

Despite its higher hardness, 4140 maintains excellent toughness through ​​precise QT process control​​. Compared to 4130’s stress relief annealed (+SR) state, 4140 better resists ​​downhole shock loads (e.g., stuck pipe, jarring) and temperature fluctuations​​, avoiding brittle fractures. It is suited for ​​long horizontal sections, extended-reach wells, and high-dynamic-stress environments​​.

​​4. Professional Adaptability: Designed for High-Challenge Drilling Scenarios​​

4140 is the ideal choice for ​​high-pressure/high-temperature (HPHT) wells, ultra-deep wells, and highly abrasive formations​​. Whether for offshore oil development, shale gas horizontal wells, or directional drilling in complex structures, its ​​integrated high-strength, high-hardness, and high-toughness properties​​ meet extreme operational demands—whereas 4130 is better suited for conventional medium-pressure wells or cost-sensitive short-depth projects.

​​III. Why Choose Our 4140-Grade Drilling Pipes?​​

Higher Standards​​: Manufactured to strict API and industry performance requirements, with each pipe undergoing eddy current testing, dimensional precision checks, and surface quality inspections.

Customizable Solutions​​: Tailored hardness ranges (28–33 HRC) or anti-corrosion coatings available based on your well conditions.

End-to-End Service​​: From grade selection consulting to after-sales technical support, we provide integrated “material + solution” services.

​​4140-Grade Drilling Pipes – Built for Extreme Drilling, Delivering Safer and More Efficient Every Run.​

Chemical Composition

Mechanical Properties

Delivery Condition​​

1. 1.

   ​​+SR (BKS) — Stress Relief Annealing after Cold Working​

2. 2.

   ​​+N (NBK) — Normalizing​

3. 3.

   ​​QT — Quenching & Tempering

FAQ:

1. Can you provide a sample to check the quality?
We can provide free sample with same or similar sizes for you to check tube quality.
You need to in charge of Express costs.

2. How about your production capacity?
3000 tons/Month.

3. What are your terms of payment?
30%TT in advance, Balance to be paid before shipment.

4. Where is your factory?
Zhangjiagang city, 1.5 hours away from Shanghai.

5. How can I get the quotation A.S.A.P?
Please send us an inquiry with full details as following,quotation will sent to you A.S.A.P:
1). Tube Standard
2). Steel Grade
3). Tube Size and Size Tolerance
4). Tube length
5). Quantity
6). If any special requirements

6. How about the minimum order quantity?
Normally for one size above 1 ton.

Welcome to contact us! Thanks.