Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | ,T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30 days |
| Packaging Details | Pallet |
| Material | 42CrMo4, 18CrNiMo7-6 |
| Machining | roughing |
| Heat Treatment | Annealed and normalized, or customized |
| Forging Tolerance | On request |
| Testing | UT & MT |
| Oil Protecting | Provided |
| Hardness | Customized according to the provided standards |
| HS Code | 84834999 |
| Brand Name | Tiangong |
| Model Number | TG-005 |
| 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 | 30 days | Packaging Details | Pallet |
| Material | 42CrMo4, 18CrNiMo7-6 | Machining | roughing |
| Heat Treatment | Annealed and normalized, or customized | Forging Tolerance | On request |
| Testing | UT & MT | Oil Protecting | Provided |
| Hardness | Customized according to the provided standards | HS Code | 84834999 |
| Brand Name | Tiangong | Model Number | TG-005 |
| Certification | ISO9001, ISO14001,ISO45001 | Place of Origin | Changzhou, China |
| High Light | Hydraulic Forged Cylinder ，Mechanical Forged Cylinder | ||
Custom Open Die Forged Cylinder for Mechanical and Hydraulic Systems
Our custom open die forged cylinders are designed to meet the demanding requirements of mechanical and hydraulic systems operating under high pressure, repetitive motion, and heavy loads. Manufactured from premium carbon or alloy steel, each cylinder is forged with a controlled grain structure to improve internal strength and fatigue resistance. With flexible sizing, material selection, and optional machining services, we deliver fully tailored components for critical industrial applications.
| Item | Details |
|---|---|
| Product Name | Custom Open Die Forged Cylinder for Mechanical and Hydraulic Systems |
| Material Grades | - Alloy & carbon steels: 42CrMo4, 4140, C45, and others available upon request - Selected for strength, machinability, and pressure resistance in dynamic mechanical environments |
| Forging Equipment | - Open Die Hydraulic Hammers and Presses: 5T, 8T, 12T - Capable of producing cylinders with consistent grain flow and dense structure |
| Manufacturing Process | Raw Material Inspection → Open Die Forging → Heat Treatment (Q+T or N+T) → Rough or Precision Machining → Non-Destructive Testing → Dimensional Control → Packaging |
| Forging Ratio | ≥ 3.0 – Delivers improved grain refinement, higher fatigue strength, and low internal stress concentration |
| Applications | - Hydraulic cylinders for mobile and stationary equipment - Structural sleeves and pressure components in mechanical presses - Cylindrical blanks for machining into custom actuator or jack bodies |
| Delivery Conditions | - Standard: Quenched + Tempered (Q+T) or Normalized + Tempered (N+T) - Optional: As-forged, semi-machined, or finish-machined per drawings |
| Testing & Inspection | - Chemical Composition: Verified via Optical Emission Spectrometer - Mechanical Properties: Tensile, impact, and hardness testing - Non-Destructive Testing: UT and MT available - Dimensional Accuracy: OD/ID, straightness, concentricity measured to customer specification |
Material Flexibility: Offered in 42CrMo4, 4140, C45, and other grades based on application needs
Forging Ratio ≥ 3.0: Ensures grain alignment, minimized porosity, and superior mechanical integrity
Heat Treatment Options: Supplied in normalized + tempered or quenched + tempered condition
Machining Ready: Suitable for honing, boring, and CNC finishing based on project specifications
Testing Included: UT, MT, and dimensional reports provided per customer request
Hydraulic Systems: Main cylinders, pressure housings, and actuator bodies
Mechanical Presses: Piston sleeves, load-bearing shafts, and tubular frames
Construction Equipment: Forged cylinders for excavators, piling rigs, and drill systems
Port & Lifting Equipment: Crane lift cylinders, gantry motion modules, and boom supports
Energy & Process Industries: Forged bodies for compressors, pressure vessels, and heat exchanger shells
More products we are producing:
The steel forgings production flow:
1. What is your forging capacity in terms of weight?
We produce open die forged cylinders and components ranging from 100 kg to 7000 kg, covering both medium-duty and heavy-duty industrial requirements.
2. Can you perform heat treatment and machining in-house?
Yes, we offer complete in-house services, including quenching and tempering, as well as rough or finish machining based on customer needs.
3. Which industries use your forged cylinders?
Our forged cylinders are widely used in mechanical presses, hydraulic systems, construction equipment, energy systems, and material handling machinery.
4. What is your standard production lead time?
If material is available: Typically around 30 days
If new material is required: Usually 40–45 days, depending on size and machining scope
5. Where is your production facility located?
Our plant is situated in Changzhou City, Jiangsu Province, near Shanghai, with convenient export logistics through Shanghai Port.
Please send us your technical drawings and detailed specifications.
Our engineering and sales teams will evaluate the requirements and respond with a tailored quotation and technical recommendation in a timely manner.
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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