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 | ASTM A513 oil drilling pipe ，seamless steel drill rod ，low eccentricity drilling pipe | ||
Toughness meets strength for the harshest drilling conditions. The 45MnMoB-grade pipe delivers unmatched load capacity, superior wear resistance, and rugged durability where standard pipes fail.
1. Extreme Strength – Handles ultra-deep wells (>3,000m) & high-pressure reservoirs (≥50 MPa) with tensile strength ≥790 MPa.
2. Rock-Hard Wear Resistance – Manganese & molybdenum boost hardness (QT-treated up to 28–32 HRC) to fight abrasion.
3. Impact-Ready – Absorbs shocks (stuck pipe, vibrations) with ≥14% elongation.
4. Corrosion & Heat Resistant – Low sulfur/phosphorus + molybdenum for tough fluids & high temps.
5. Weldable & Tough – Field-ready welding & machining for demanding jobs.
Perfect For: Ultra-deep, high-wear, or HPHT wells.
Upgrade when 1541/4130 can’t keep up.
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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