Jiangsu Hongbao Group Co., Ltd.
| Payment Terms | L/C, T/T |
| Supply Ability | 3000MT/Month |
| Delivery Time | 45 - 60 days |
| Packaging Details | Plywood case, wooden box |
| Material | 30CrMo（4130/34CrMo4）, 42CrMo（4140/42CrMo4）, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 |
| Standard | GB/T 9808, ASTM A519, DIN2391, EN10305-1 |
| OD Range | 4-219mm |
| WT Range | 0.5-20mm |
| Processing | Cold Rolling |
| Brand Name | HONGBAO |
| Model Number | HG-OP |
| Certification | ISO9001 |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 3000MT/Month |
| Delivery Time | 45 - 60 days | Packaging Details | Plywood case, wooden box |
| Material | 30CrMo（4130/34CrMo4）, 42CrMo（4140/42CrMo4）, 40Mn2, 45MnMoB, 30CrMnSiA, 4135, 1541 | Standard | GB/T 9808, ASTM A519, DIN2391, EN10305-1 |
| OD Range | 4-219mm | WT Range | 0.5-20mm |
| Processing | Cold Rolling | Brand Name | HONGBAO |
| Model Number | HG-OP | Certification | ISO9001 |
| Place of Origin | China | ||
| High Light | chromoly steel tubing for oil drilling ，4140 alloy casing pipe ，oil well drilling chromoly pipe | ||
Description
This high-performance chromoly steel tubing represents a premium series of oil well drilling pipes manufactured from AISI 4130, 4140, and 4145 alloy steels, specifically engineered for demanding casing applications in the oil and gas industry. These seamless chromoly tubes offer superior mechanical properties and enhanced performance characteristics compared to conventional carbon steel pipes, making them ideal for critical downhole operations where reliability and durability are essential.
The triple-grade composition provides engineers with optimized material selection based on specific well requirements: AISI 4130 offers excellent strength with good weldability, AISI 4140 delivers enhanced strength and wear resistance, while AISI 4145 provides the highest strength and hardness for the most demanding applications. All three grades feature chromium-molybdenum alloying elements that contribute to their superior tensile strength, exceptional toughness, and improved fatigue resistance in challenging downhole environments.
Manufactured through advanced seamless extrusion processes, these drilling pipes maintain precise dimensional accuracy and wall thickness consistency throughout their length. The heavy-wall construction ensures maximum collapse resistance and structural integrity when deployed as casing strings in deep well, high-pressure, and high-temperature applications. Each grade undergoes specific heat treatment processes - including quenching and tempering - to achieve optimal mechanical properties tailored to their respective chemical compositions.
Specification
| Specifications | ASTM, ASME and API |
| Size | O.D.: 4 to 219mm W. T.: 0.5 to 20mm |
| Specialized in | Large Diameter Size |
| Length | Within 13500mm |
| Type | Seamless |
| Shape | Round |
| End | Plain End, Beveled End, Treaded |
Chemical Composition
| Steel Grade | C | Si | Mn | P | S | Cr | Mo |
| 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 |
Key Features and Benefits
Superior Mechanical Properties: High yield strength (550-950 MPa) and excellent impact toughness
Enhanced Collapse Resistance: Heavy-wall design withstands extreme formation pressures
Improved Fatigue Performance: Excellent resistance to cyclic loading and vibration stresses
Multiple Grade Options: Tailored material selection for specific well conditions
Seamless Construction: Homogeneous microstructure without weld defects
Quality Assurance
Full traceability and material certification
Ultrasonic testing for defect detection
Hydrostatic pressure testing
Dimensional and visual inspection
Hardness testing and mechanical property verification
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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