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 |
| Execution Standard | ASTM A519, DIN2391, EN10305-1 |
| OD Range | 30-139.7mm |
| WT Range | 3-19mm |
| 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 | Execution Standard | ASTM A519, DIN2391, EN10305-1 |
| OD Range | 30-139.7mm | WT Range | 3-19mm |
| Brand Name | HONGBAO | Model Number | HG-OP |
| Certification | PED, ISO9001,DNV | Place of Origin | China |
| High Light | Seamless Steel Casing Drill Pipe ，Tubing Seamless Steel Casing ，Oilfield Oil Well Drilling Pipe | ||
Tensile Strength: ≥950 MPa (Superior resistance to burst and collapse under ultra-high downhole pressures, ideal for deep/complex wells).
Yield Strength: ≥850 MPa (Maintains structural integrity under heavy loads, preventing deformation even in prolonged drilling operations).
Hardened surface (quenched & tempered) delivers superior abrasion resistance against drilling cuttings and formation friction, extending service life.
Controlled hardness range ensures balance between toughness and durability, avoiding brittleness while maximizing wear protection.
QT (Quenched & Tempered) delivery condition refines microstructure, eliminating internal stresses and enhancing uniformity in strength/hardness.
Delivers consistent mechanical properties across the entire pipe length, critical for reliable performance in variable well conditions.
High-strength Cr-Mo alloy (Chromium-Molybdenum) base improves cyclic load resistance (vital for extended reach drilling and repeated tripping operations).
Maintains impact toughness even at elevated hardness levels, reducing the risk of sudden failure under dynamic stresses.
Chromium (0.80–1.10%) enhances corrosion resistance in mildly aggressive fluids (better than standard carbon steels).
Molybdenum (0.15–0.25%) boosts high-temperature stability, ensuring reliability in hot wells or during cementing operations.
Excellent weldability (with proper pre/post-weld heat treatment), facilitating field repairs or custom connections.
Perfect for deep drilling, high-pressure/high-temperature (HPHT) wells, and abrasive formations where maximum strength and wear resistance are non-negotiable.
Also suitable for heavy-duty casing/tubing requiring long-term durability in challenging environments.
Ultimate Strength – Outperforms standard grades (e.g., 4130) with higher tensile/yield values, ideal for critical well sections.
Longer Service Life – Hardness (28–33 HRC) and wear resistance minimize downtime from pipe damage or erosion.
Engineered Reliability – QT process ensures consistent performance, reducing the risk of unexpected failures.
Global Compliance – Meets/exceeds API and industry standards for high-performance drilling applications.
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 |
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 |
+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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