Mettre en évidence:
seamless steel oil drilling pipe
, 34CrMo4 steel coupling tube
, low residual hoop stress pipe
Grade d'acier: |
30crmo, 42crmo, 30crmnsia, 40mn2, 45mnmob, 30crmnsia, 4135, 1541 |
Norme d'exécution: |
ASTM A519, Din2391, EN10305-1, GB / T 9808 |
Gamme d'OD: |
30-139,7 mm |
Gamme de POIDS: |
3-19 mm |
traitement: |
Rouleau froid, à froid dessiné |
Couleur: |
Noir |
GB/T 9808 Seamless Steel Oil Drilling Pipe 34CrMo4 Steel Coupling Tube with Low Residual Hoop Stresses
4130 Grade Drilling Pipe – Reliable Strength & Weldability for Standard Oilfield Wells
A versatile, cost-effective solution for conventional drilling, 4130 grade drilling pipe combines balanced mechanical strength, excellent weldability, and durable performance to meet the needs of standard oilfield operations.
Key Advantages
1. Proven Strength – Tensile strength ≥813 MPa, yield strength ≥690 MPa for reliable operation in wells up to 3,000m depth and moderate pressures.
2. Easy Welding – Low-carbon, chromium-molybdenum (Cr-Mo) alloy allows field welding with minimal preheat, saving time and costs.
3. Tough & Durable – 15% elongation absorbs vibrations and shocks, reducing crack risks in daily drilling.
4. Cost-Effective – Affordable alloy mix (Cr-Mo optimized) delivers high performance at a lower cost than premium grades.
5. Widely Used – Trusted in conventional oil/gas wells, water wells, and geothermal projects worldwide.
Ideal for: Standard-depth wells (≤3,000m), moderate pressures, and operations needing strong, weldable pipes.
Upgrade to 4140 for extreme depths; choose 1541 for budget-first shallow wells.
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.+SR (BKS) — Stress Relief Annealing after Cold Working
2.+N (NBK) — Normalizing
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.
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