Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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42CrMo Heat Treated Open Die Forgings are high-strength components manufactured for critical oil and gas drilling applications. Utilizing 42CrMo alloy steel , these forgings undergo precision open die forging followed by Normalizing and Tempered heat treatment. This process ensures exceptional fatigue resistance, toughness, and structural reliability in extreme downhole environments, including high pressure, corrosive fluids, and cyclic stresses.
Ultra-High Strength & Toughness
Normalizing + Tempering to enhance toughness, stabilize structure, and ensure dimensional consistency under hydraulic pressure
Superior Fatigue Resistance
Optimized microstructure withstands stress cycles in vibrating drill strings.
Critical Fracture Toughness
Prevents catastrophic crack propagation in sour gas (H₂S) environments.
Stress-Corrosion Cracking (SCC) Resistance
Tempering reduces susceptibility to sulfide stress cracking.
Directional Grain Flow
Open die forging aligns grain structure with part contours, enhancing load-bearing capacity.
Drill Collars: Heavy weighted bars below drill pipes for directional control.
Tool Joints: High-stress connections between drill pipe segments.
Mud Motor Components: Rotors, driveshafts, and housings for downhole drilling motors.
BOP (Blowout Preventer) Parts: Rams, stems, and bonnets requiring fracture resistance.
Heavyweight Drill Pipes: Transition pipes between drill collars and standard pipes.
| Item | Details |
|---|---|
| Product Name | 42CrMo Heat Treated Open Die Forgings for Oil and Gas Drilling Tools |
| Material Grades | - 42CrMo alloy steel (AISI 4140 equivalent) - Engineered for high strength and fatigue resistance in downhole environments |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T - Capable of producing thick-section forgings with directional grain flow |
| Manufacturing Process | Raw Material Inspection → Preheating → Open Die Forging → Heat Treatment → Rough Machining → Non-Destructive Testing → Final Machining (if required) → Dimensional Inspection → Packaging |
| Forging Ratio | ≥ 3.0 — Ensures enhanced internal density and fatigue resistance for critical drilling components |
| Applications | - Drill collars and heavyweight drill pipes - Tool joints and drill string subs - Mud motor shafts and rotors - BOP rams and stems - Fishing tool components |
| Testing & Inspection | - Chemical Analysis (Optical Spectrometry) - Mechanical Testing: Tensile, Impact, Hardness - Non-Destructive Testing: Ultrasonic Testing (UT), Magnetic Particle Testing (MT) - Dimensional inspection |
Frequently Asked Questions (FAQs)
What is the typical weight scope for the forged components you manufacture? Our forging capabilities cover a spectrum from 100 kilograms up to 7 metric tons.
Do your services extend beyond forging to include thermal processing and material shaping? Affirmative. We provide comprehensive in-house heat treatment services, along with both preliminary and final machining operations.
What are the primary industrial sectors that you serve with your products? Our clientele spans various key industries, including wind power generation, heavy construction equipment, port infrastructure, power transmission systems, and numerous others.
What are your standard timelines for order fulfillment? For items currently in our inventory, the typical lead time is approximately 30 days. For custom-produced orders, the timeframe is generally 40 to 45 days.
Could you specify the geographical location of your production facility? Our factory is situated in Changzhou City, which is conveniently located near Shanghai, and we utilize the shipping facilities at the Port of Shanghai.
Request a Quotation
To receive a tailored proposal and engineering assessment, we invite you to submit your detailed technical drawings and specific requirements. Our engineering team will promptly review your submission and provide you with a professional quotation and tailored solution.