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 |
| 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 |
| Brand Name | HONGBAO | Model Number | HG-OP |
| Certification | PED, ISO9001,DNV | Place of Origin | China |
| High Light | 4140 seamless steel oil well pipe ，high straightness drill rod tube ，oilfield water drilling pipe | ||
In the oilfield drilling sector, steel selection directly determines the load-bearing capacity, wear resistance, and long-term reliability of drill pipes and casings. Below is a comparison of key parameters between 4140 and 4130 grades, highlighting the core advantages of 4140-grade drilling pipes to help you make an informed choice.
| Performance Metric | 4130 Grade (Benchmark) | 4140 Grade (Our Product) | Advantage |
|---|---|---|---|
| Tensile Strength | ≥813 MPa | ≥950 MPa | 17%+ higher – Handles ultra-high well pressures with ease, reducing burst risks. |
| Yield Strength | ≥690 MPa | ≥850 MPa | 23% higher – Stronger resistance to deformation, ensuring wellbore structural stability. |
| Elongation | ≥15% | ≥14% | Slightly lower but balanced by high-strength toughness design. |
| Hardness (HRC) | ≥24 | 28–33 | Significantly harder – Enhanced wear resistance, minimizing drill cuttings abrasion. |
| Delivery Condition | Stress Relief Annealed (+SR) | Quenched & Tempered (QT) | QT process balances strength and toughness, combining hardness with impact resistance. |
| Typical Applications | Conventional medium-low pressure wells, short-depth drilling | High-pressure deep wells, complex formations, long horizontal sections | Engineered for extreme load conditions. |
4140 grade achieves its superior performance through higher carbon content (0.38–0.43) and alloy reinforcement (Cr 0.80–1.10, Mo 0.15–0.25). The quenched & tempered (QT) process delivers a tensile strength of ≥950 MPa and yield strength of ≥850 MPa—17% and 23% higher than 4130, respectively. This enables it to withstand greater downhole pressures, tension, and torque, making it ideal for high-pressure deep wells, complex formations (e.g., hard rock, fault zones), and reducing risks of fractures or deformations for safer operations.
With a hardness range of 28–33 HRC (vs. 4130’s ≥24 HRC), 4140’s fine-quenched and tempered martensitic microstructure significantly enhances surface durability. It effectively resists drill cuttings impact, formation friction, and casing abrasion, minimizing wear-induced thinning or leaks. This extends the service life of drill pipes/casings, reducing downtime and replacement costs.
Despite its higher hardness, 4140 maintains excellent toughness through precise QT process control. Compared to 4130’s stress relief annealed (+SR) state, 4140 better resists downhole shock loads (e.g., stuck pipe, jarring) and temperature fluctuations, avoiding brittle fractures. It is suited for long horizontal sections, extended-reach wells, and high-dynamic-stress environments.
4140 is the ideal choice for high-pressure/high-temperature (HPHT) wells, ultra-deep wells, and highly abrasive formations. Whether for offshore oil development, shale gas horizontal wells, or directional drilling in complex structures, its integrated high-strength, high-hardness, and high-toughness properties meet extreme operational demands—whereas 4130 is better suited for conventional medium-pressure wells or cost-sensitive short-depth projects.
Higher Standards: Manufactured to strict API and industry performance requirements, with each pipe undergoing eddy current testing, dimensional precision checks, and surface quality inspections.
Customizable Solutions: Tailored hardness ranges (28–33 HRC) or anti-corrosion coatings available based on your well conditions.
End-to-End Service: From grade selection consulting to after-sales technical support, we provide integrated “material + solution” services.
4140-Grade Drilling Pipes – Built for Extreme Drilling, Delivering Safer and More Efficient Every Run.
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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