Jiangsu Hongbao Group Co., Ltd.
| Payment Terms | L/C, T/T |
| Supply Ability | 3000MT/Month |
| Delivery Time | Negotiable |
| Packaging Details | As required |
| Material | 30CrMo（4130/34CrMo4）, 42CrMo（4140/42CrMo4）, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 |
| Standard | GB/T 9808, ASTM A519, DIN2391, EN10305-1, |
| OD Range | 30-139.7mm |
| WT Range | 3-19mm |
| Processing | Cold Rolling |
| Color | Black |
| Brand Name | HONGBAO |
| Model Number | HG-OP |
| Certification | PED, ISO9001, DNV |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 3000MT/Month |
| Delivery Time | Negotiable | Packaging Details | As required |
| Material | 30CrMo（4130/34CrMo4）, 42CrMo（4140/42CrMo4）, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 | Standard | GB/T 9808, ASTM A519, DIN2391, EN10305-1, |
| OD Range | 30-139.7mm | WT Range | 3-19mm |
| Processing | Cold Rolling | Color | Black |
| Brand Name | HONGBAO | Model Number | HG-OP |
| Certification | PED, ISO9001, DNV | Place of Origin | China |
| High Light | EN10305-1 steel drilling rod ，45MnMoB seamless oil well pipe ，drilling pipe with coupling tube | ||
The 45MnMoB-grade drilling pipe is a high-performance alloy steel solution engineered for oilfield operations that demand exceptional strength, superior wear resistance, and enhanced impact toughness. With its unique chemical composition (notably high manganese and molybdenum content) and tailored mechanical properties, this grade stands out as an optimal choice for extreme drilling environments where standard grades fall short.
Tensile Strength: ≥790 MPa (minimum) – Comparable baseline to premium grades, with enhanced load-bearing capacity for ultra-deep wells (depths >3,000m) and high-pressure reservoirs (≥50 MPa).
Yield Strength: ≥600 MPa (minimum) – Ensures structural integrity under extreme stress, resisting deformation during heavy drilling loads, casing installation, or hydraulic fracturing operations.
Hardness Potential (QT Treated): Up to 28–32 HRC (when quenched & tempered) – Delivers superior resistance to wear and abrasion from aggressive drilling cuttings and hard rock formations, outperforming conventional carbon steels.
Manganese (Mn): 1.05–1.35% – Enhances hardenability, strength, and toughness, ensuring the material maintains durability even under high-impact loads.
Molybdenum (Mo): 0.20–0.25% – Improves high-temperature stability and fatigue resistance, critical for extended reach drilling, thermal recovery wells, or HPHT (high-pressure/high-temperature) environments.
Low Sulfur & Phosphorus (S≤0.015%, P≤0.020%) – Minimizes brittleness and corrosion risks, ensuring cleaner microstructure and longer service life.
Elongation: ≥14% – Balances strength with ductility, allowing the pipe to absorb sudden shocks (e.g., stuck pipe, bit bounce) or vibration without catastrophic failure.
Grain Size Control (Fine-Martensitic Structure) – Refined grains (achieved via QT) enhance fracture toughness, reducing crack propagation risks in brittle conditions.
Engineered for hard rock drilling, abrasive sandstone/shale layers, and high-wear zones where standard carbon steels (e.g., 1541) or even 4130 may struggle.
QT-treated variants (optional) provide surface hardness up to 32 HRC, significantly extending service life in corrosive or erosive well fluids (e.g., high-sand content, acidic formations).
While manganese content requires careful welding procedures (preheating/post-weld heat treatment for thick sections), modern techniques ensure reliable field joints when protocols are followed.
Machinability is manageable for threading and end finishing with appropriate tooling, supporting efficient manufacturing and maintenance.
| Feature | 45MnMoB Grade | 4130 Grade | 4140 Grade | 1541 Grade |
|---|---|---|---|---|
| Primary Strength | Ultra-high (QT-treated: 28–32 HRC) | High (24–28 HRC, balanced) | Highest (28–33 HRC, premium Cr-Mo) | Moderate (standard C-Mn, no alloy boost) |
| Wear Resistance | Excellent (Mn/Mo + QT hardness) | Good (24–28 HRC) | Outstanding (Cr-Mo + QT) | Fair (low alloy, softer) |
| Toughness | Good (fine grains, ≥14% elongation) | Very Good (balanced HRC & ductility) | Good (QT-balanced) | Moderate (higher elongation but lower strength) |
| Cost Efficiency | Moderate (specialized alloy) | High (Cr-Mo but widely used) | Lower (premium Cr-Mo + complex QT) | Highest (basic C-Mn, no alloy) |
| Best For | Ultra-deep, abrasive, HPHT wells | Deep/complex wells (balanced needs) | Extreme high-pressure wells | Shallow/medium wells, cost-sensitive |
Built for Extremes – Delivers unmatched strength and wear resistance for high-load, high-wear drilling scenarios where standard grades fail.
Alloy-Optimized – Manganese and molybdenum enhance hardenability, high-temperature stability, and fatigue life – critical for modern deep drilling.
Tailored Hardness – Optional QT treatment pushes surface hardness to 32 HRC, combating abrasion and extending service intervals.
Reliable in Harsh Fluids – Low sulfur/phosphorus and fine microstructure resist corrosion and erosion in aggressive well environments.
45MnMoB-Grade Drilling Pipes – When your well demands more than ordinary steel can handle.
(For less extreme wells, 4130/4140 offer balanced alternatives; for budget-first projects, 1541 remains cost-effective. We customize solutions to your exact well conditions.)
Delivery Condition:
Stress Relief Annealing after Cold Working (+SR) (BKS)
Normalizing (+N) (NBK)
Quenching & Tempering (QT)
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 |
| 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 |
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.
Company Details
Business Type:
Manufacturer
Year Established:
1958
Total Annual:
60000000-80000000
Employee Number:
700~1000
Ecer Certification：
Verified Supplier
Jiangsu Hongbao Group (Pipe) Co., Ltd. (Zhangjiagang Hongda Pipe Co., Ltd.) is a high-tech company in Jiangsu province. The company has a registered capital of RMB 89 million, covers an area of 130,000 square meters, employs 600 staff, and has annual sales of RMB 400 million. The company is speciali... Jiangsu Hongbao Group (Pipe) Co., Ltd. (Zhangjiagang Hongda Pipe Co., Ltd.) is a high-tech company in Jiangsu province. The company has a registered capital of RMB 89 million, covers an area of 130,000 square meters, employs 600 staff, and has annual sales of RMB 400 million. The company is speciali...
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