Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Heat Treatment | Normalizing and tempering |
| Transport Package | Pallet |
| Machining | Hydraulic Hammers |
| Surface Finish | Customizable |
| Advantages | corrosion resistant |
| Type | Open die forging |
| Material | Alloy steel and Customizable |
| Apply | Oil and Gas Drilling Tools |
| Brand Name | Tiangong |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 56000 Tons per year |
| Delivery Time | 30days | Packaging Details | Pallet |
| Heat Treatment | Normalizing and tempering | Transport Package | Pallet |
| Machining | Hydraulic Hammers | Surface Finish | Customizable |
| Advantages | corrosion resistant | Type | Open die forging |
| Material | Alloy steel and Customizable | Apply | Oil and Gas Drilling Tools |
| Brand Name | Tiangong | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | 42crmo open die forgings ，open die hammer forging customizable ，open die forgings heat treated | ||
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 |
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
1994
Total Annual:
27.5 million -28 million
Employee Number:
135~150
Ecer Certification：
Verified Supplier
About CHANGZHOU TIANGONG We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet ... About CHANGZHOU TIANGONG We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet ...
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