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 |
View Detail Information
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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 | ASTM A513 oil drilling pipe ，42CrMo4 steel drill rod ，oil well pipe microstructure | ||
Engineered for high-pressure, high-load drilling environments, 4140 grade drilling pipe delivers exceptional strength, superior wear resistance, and reliable performance for the toughest oilfield applications.
1. Ultimate Strength – Tensile strength ≥950 MPa, yield strength ≥850 MPa for deep wells and high-pressure reservoirs (far exceeding standard grades).
2. Premium Hardness (28–33 HRC) – Exceptional resistance to abrasion and wear from drill cuttings and hard formations, extending service life.
3. Quenched & Tempered (QT) Process – Delivers balanced strength and toughness, preventing brittle failure under extreme loads.
4. High-Cost Performance – Chromium-molybdenum (Cr-Mo) alloying provides superior fatigue resistance and high-temperature stability vs. standard carbon steels.
5. Proven in Harsh Conditions – Trusted for ultra-deep wells, HPHT wells, and abrasive formations where ordinary pipes fail.
Ideal for: Deep drilling, high-pressure reservoirs, hard rock formations, and heavy-duty operations.
Upgrade from 4130/1541 when extreme strength and wear resistance are required.
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. Stress Relief Annealing after Cold Working (+SR) (BKS)
2. Normalizing (+N) (NBK)
3. Quenching & Tempering (QT)
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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