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 | seamless steel oil well pipe ，30CrMnSiA steel casting tube ，low residual hoop stresses pipe | ||
Engineered for medium-high pressure, weakly corrosive, and dynamic-loading well environments, 30CrMnSiA grade drilling pipe delivers exceptional strength, corrosion resistance, and weldability — making it the reliable choice for challenging oilfield applications.
1. High Strength
Tensile strength ≥850 MPa – Outperforms standard carbon steels, ensuring reliable performance in high-pressure wells (35–50 MPa) and critical structural applications (e.g., deep casing).
2. Corrosion Resistance
0.80–1.10% Chromium – Forms a protective oxide layer to resist brine, CO₂, and weakly acidic fluids, surpassing non-alloy carbon steels (e.g., 1541) in moderately corrosive environments (e.g., water injection wells, offshore fields).
3. Weldable Design
Low carbon equivalent (Ceq) – Enables low-preheat, post-weld heat treatment (PWHT)-free field welding, reducing downtime and simplifying on-site operations (e.g., casing connections, repairs).
4. Balanced Toughness
Elongation ≥14% – Absorbs dynamic loads (drill bit vibrations, pressure pulses), minimizing crack propagation and extending service life.
5. Lightweight & Efficient
Lighter than 4140 steel – Reduces tripping loads in deep/extended-reach wells without sacrificing strength.
1. Better Than 1541 – Superior corrosion resistance for moderately corrosive wells (e.g., injection, offshore).
2. Cost-Effective Alternative to 4140/4130 – Delivers high strength (near 4130) and weldability at a lower alloy cost than premium grades (e.g., 4140).
3. Versatile Performance – Ideal for weld-intensive operations, dynamic-loading wells, and corrosion-sensitive environments.
Perfect for: Medium-high pressure wells, weakly corrosive formations, welding-heavy applications.
For extreme pressures, choose 4140; for shallow/budget wells, consider 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 |
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.
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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