Highlight:
EN10305-1 steel oil well pipe
, 30CrMnSiA seamless drilling rod
, low eccentricity steel tube
EN10305-1 Steel Oil Well Pipe 30CrMnSiA Seamless Steel Drilling Rod Tube with Low Eccentricity
30CrMnSiA Grade Drilling Pipe: Corrosion-Resistant, High-Strength & Weldable Wellbore Solution
Engineered for medium-high pressure, weakly corrosive, and dynamically loaded well conditions, the 30CrMnSiA-grade drilling pipe combines chromium-manganese alloy reinforcement, superior weldability, and balanced toughness to deliver reliable performance in complex oilfield applications.
Core Advantages
1. High-Strength Corrosion Resistance
Tensile strength ≥850 MPa; chromium (0.80–1.10%) forms a passive oxide layer to resist brine/weak acid fluids, outperforming standard carbon steels.
2. Lightweight Yet Tough
Lighter than 4140 steel, reducing tripping loads while maintaining high strength (comparable to 4130), ideal for deep well structural demands.
3. Worry-Free Weldability
Low carbon equivalent design enables low-preheat field welding, ensuring reliable wellbore connections and repairs.
4. Dynamic Adaptability
Elongation ≥14% absorbs vibrations/pressure pulses, minimizing crack risks and extending service life.
Why Choose 30CrMnSiA?
1. Beats 1541 – Superior corrosion resistance for water injection wells, offshore wells, and moderately corrosive environments.
2. Cost-Effective Balance – Lower alloy investment than 4140/4130, with performance matching premium grades.
3. 30CrMnSiA Grade – The ideal choice when your well demands strength, corrosion resistance, and weld-friendly performance.
(Ideal for: Medium-high pressure wells, weakly corrosive formations, welding-intensive operations. Extreme high-pressure: Choose 4140; shallow/budget wells: Opt for 1541.)
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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