Jiangsu Hongbao Group Co., Ltd.
| Payment Terms | L/C, T/T |
| Supply Ability | 3000MT/Month |
| Delivery Time | Negotiable |
| Packaging Details | As required |
| Steel Grade | 30CrMo, 42CrMo, 30CrMnSiA, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 |
| Execution Standard | ASTM A519, DIN2391, EN10305-1, GB/T 9808 |
| OD Range | 30-139.7mm |
| WT Range | 3-19mm |
| Processing | Cold Roll, Cold Drawn |
| 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 |
| Steel Grade | 30CrMo, 42CrMo, 30CrMnSiA, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 | Execution Standard | ASTM A519, DIN2391, EN10305-1, GB/T 9808 |
| OD Range | 30-139.7mm | WT Range | 3-19mm |
| Processing | Cold Roll, Cold Drawn | Color | Black |
| Brand Name | HONGBAO | Model Number | HG-OP |
| Certification | PED, ISO9001,DNV | Place of Origin | China |
| High Light | 30CrMnSiA seamless steel oil well pipe ，high-pressure drilling steel tube ，DIN2391 standard oil well pipe | ||
The 30CrMnSiA-grade drilling pipe is a premium low-alloy high-strength steel engineered for oilfield operations that demand exceptional strength-to-weight ratio, superior corrosion resistance, and reliable weldability. With its optimized chromium (Cr) and manganese (Mn) content, precise heat treatment, and balanced mechanical properties, this grade is ideal for high-pressure environments, corrosive formations, and applications requiring structural integrity under dynamic loads.
Tensile Strength: ≥850 MPa (minimum) – Delivers robust load-bearing capacity for high-pressure wells (35–50 MPa) and critical structural components (e.g., casing in deep sections), surpassing conventional carbon steels.
Yield Strength: ≥750 MPa (minimum) – Ensures minimal deformation under sustained stress, maintaining wellbore stability during prolonged drilling or hydraulic fracturing.
Lighter Weight than Higher-Alloy Steels (e.g., 4140) – Reduces hoisting loads and operational complexity in deep/extended-reach wells without compromising strength.
Chromium (Cr): 0.80–1.10% – Forms a passive oxide layer, improving resistance to mildly corrosive fluids (e.g., brine, CO₂-containing environments) compared to non-alloy carbon steels (e.g., 1541).
Manganese (Mn): 0.80–1.10% – Supports hardenability while contributing to general corrosion resistance in variable pH formations.
Ideal for Weakly Aggressive Wells – Outperforms standard carbon steels in shallow gas wells, water injection systems, or coastal offshore environments with moderate corrosion risks.
Low Carbon Equivalent (Ceq) – Enables ease of welding (e.g., field joint welding) with minimal preheating or post-weld heat treatment requirements, reducing downtime and labor costs.
Consistent Microstructure Post-Welding – Maintains mechanical integrity around welded zones, critical for on-site repairs or custom casing connections.
Adaptable to Complex Geometries – Supports precision threading and bending for directional drilling or horizontal well applications.
Elongation: ≥14% – Combines strength with sufficient ductility to absorb dynamic loads (e.g., bit vibration, pressure pulsations) without cracking.
Fine-Grained Microstructure (QT Optional) – Enhances impact toughness and fatigue life in cyclic-loading scenarios (e.g., long-term production or thermal cycling wells).
Lower Alloy Cost than 4140/4130 (reduced Cr/Mo content) – Provides high-strength and corrosion resistance at a more economical price point than premium Cr-Mo grades, balancing performance and budget.
| Feature | 30CrMnSiA Grade | 4140 Grade | 4130 Grade | 1541 Grade |
|---|---|---|---|---|
| Corrosion Resistance | Good (Cr-enhanced, mild environments) | Fair (limited without coating) | Fair (limited without coating) | Poor (standard carbon steel) |
| Weldability | Excellent (low Ceq, minimal preheat) | Good (requires controlled process) | Good (requires controlled process) | Good (but lower strength) |
| Strength Level | High (850 MPa tensile) | Highest (950 MPa tensile) | High (813 MPa tensile) | Moderate (800–950 MPa baseline) |
| Cost Efficiency | High (balanced alloy, lower Cr/Mo) | Lower (premium Cr-Mo alloy) | Medium (Cr-Mo alloy) | Highest (basic carbon steel) |
| Best For | Corrosive wells, mid-pressure HPHT, welded structures | Extreme high-pressure wells | Deep/complex wells (balanced) | Shallow/low-cost wells |
1. Corrosion-Resistant Strength – Outperforms standard carbon steels in mildly aggressive fluids (brine, CO₂), ideal for water injection, coastal, or gas wells with corrosion risks.
2. Weld-Friendly Design – Simplifies field welding and on-site modifications without sacrificing structural integrity, reducing operational costs.
3. High-Strength & Lightweight – Delivers 850+ MPa tensile strength with lower weight than 4140, optimizing hoisting efficiency in deep wells.
4. Balanced Cost & Performance – More affordable than 4140/4130 while providing superior corrosion resistance and weldability for mid-range drilling challenges.
30CrMnSiA-Grade Drilling Pipes – Engineered for wells where strength, corrosion resistance, and weldability matter.
(For extreme high-pressure wells, choose 4140; for budget-first shallow projects, 1541 remains an option. We customize solutions to your specific well conditions.)
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 |
+SR (BKS) — Stress Relief Annealing after Cold Working
+N (NBK) — Normalizing
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.
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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