Highlight:
4130 steel oil well drill pipe
, seamless steel casing drill rod
, oilfield drilling pipe for gas wells
4130 Steel Oil Well Drilling Pipe 30-139.7mm OD Seamless Casing
High-Performance Oil & Gas Drilling Pipes (4130 Grade) – Key Features & Benefits
1. Superior Mechanical Strength - Tensile Strength: ≥813 MPa (Ensures resistance to burst/collapse under high downhole pressures).
Yield Strength: ≥690 MPa (Withstands heavy loads during drilling operations without permanent deformation).
2. Excellent Ductility & Toughness - Elongation: ≥15% (Absorbs shock loads and vibrations, reducing the risk of brittle fracture in harsh environments).
3. Optimized Hardness (≥24 HRC) - Balanced hardness for wear resistance (protects against abrasion from drilling cuttings) while maintaining machinability and impact toughness.
4. Reliable Delivery Condition (+SR: Stress Relief Annealed) - Stress relief annealing minimizes internal stresses from manufacturing, ensuring dimensional stability and preventing cracking during service.
5. Proven Alloy Composition (4130 Steel) - Chromium-Molybdenum (Cr-Mo) alloy enhances:
Fatigue resistance (critical for cyclic loading in extended reach drilling).
Corrosion resistance (better than carbon steel in mildly aggressive fluids).
Weldability (simplifies field repairs/joints).
6. Ideal for Demanding Applications - Suitable for oil/gas well drilling, geothermal wells, and mineral exploration where high strength-to-weight ratio and reliability are paramount.
Why Choose Our 4130 Drilling Pipes?
1. Higher Safety – Lower risk of failure under extreme pressures/temperatures.
2. Cost-Effective – Balances performance and affordability compared to premium alloys (e.g., 4140).
3. Global Standards Compliance – Meets API and industry specifications for critical drilling operations.
Applications include fore poling (advance support), mine blasting, water well drilling, geothermal well drilling, and coal/nonferrous metal mining.
Chemical Composition
| Steel Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
B |
|
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 |
|
| 45MnMoB |
0.43-0.48 |
0.17-0.37 |
1.05-1.35 |
≤0.020 |
≤0.015 |
|
0.20-0.25 |
0.001-0.005 |
|
1541
|
0.36-0.44 |
- |
1.35-1.65 |
≤0.040 |
≤0.050 |
|
|
|
|
30CrMnSiA
|
0.28-0.34 |
0.90-1.20 |
0.80-1.10 |
≤0.020 |
≤0.015 |
0.80-1.10 |
|
|
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 |
| 45MnMoB |
+ N |
≥790 |
≥600 |
≥14% |
- |
| 1541 |
+ SR |
≥813 |
≥690 |
≥15% |
≥24 |
| 30CrMnSiA |
QT |
≥850 |
≥750 |
≥14% |
26 - 31 |
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.
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