DIN2391 Drill Rod Tube 42CrMo Steel Grade Oil Drilling Pipe Core Barrel Inner Tube & Outer Tube

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4140(42CrMo/42CrMo4) Grade Drilling Pipe – The Powerhouse for Extreme Oilfield Challenges​​

When conventional drilling pipes falter under pressure, ​​4140 grade drilling pipe steps up as the ultimate workhorse​​ for the most demanding oilfield operations. Forged with ​​high-strength chromium-molybdenum (Cr-Mo) alloy​​ and engineered through ​​precision heat treatment​​, this premium-grade pipe redefines performance in ​​high-pressure, high-wear, and high-stress environments​​.

​​Why 4140 Stands Above​​

​​1. Unmatched Load-Bearing Capacity​​

​​Tensile Strength: ≥950 MPa | Yield Strength: ≥850 MPa​​ – Outperforms standard grades by ​​15–20%​​, ensuring ​​rock-solid stability​​ in ​​ultra-deep wells (>3,000m) and high-pressure reservoirs (≥50 MPa)​​. Whether drilling through hard rock formations or enduring extreme torque, 4140 maintains structural integrity where others weaken.

2. Elite Wear & Abrasion Resistance​​

​​Hardness: 28–33 HRC (Hardened & Tempered)​​ – Nearly ​​double the hardness of conventional carbon steels​​ (e.g., 1541), 4140’s hardened martensitic microstructure ​​fights off drill cuttings, sandstone abrasion, and casing friction​​. This translates to ​​longer service life​​ and fewer replacements in abrasive formations.

​​3. Engineered for Extreme Conditions​​

​​Quenched & Tempered (QT) Process​​ – Delivers the ​​perfect balance of hardness and toughness​​. Unlike brittle high-hardness steels, 4140 absorbs ​​sudden impacts (e.g., stuck pipe, pressure spikes)​​ without cracking, ensuring ​​reliable performance in volatile wellbore conditions​​.

​​Cr-Mo Alloy Synergy​​ – Chromium enhances ​​corrosion resistance in mildly aggressive fluids​​ (e.g., brine, CO₂), while molybdenum boosts ​​high-temperature stability​​ and ​​fatigue resistance​​ for ​​long-cycle drilling operations​​.

​​4. Smart Cost-to-Performance Ratio​​

While premium-priced compared to 1541 or 4130, 4140 ​​delivers exponential value​​ by ​​reducing downtime, repair costs, and casing failures​​ in harsh environments. Its ​​extended service life​​ and ​​failure-resistant design​​ make it a ​​smart investment for high-stakes drilling projects​​.

​​Where 4140 Excels​​

​​Ultra-Deep Wells​​ (>3,000m)

​​High-Pressure Reservoirs​​ (≥50 MPa)

​​Abrasive Formations​​ (e.g., sandstone, conglomerate)

​​Heavy-Duty Drilling​​ (e.g., directional, extended-reach wells)

​​HPHT (High-Pressure/High-Temperature) Environments​

Chemical Composition

Mechanical Properties

Delivery Condition:

1. Stress Relief Annealing after Cold Working (+SR) (BKS)

2. Normalizing (+N) (NBK)

3. Quenching & Tempering (QT)

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.