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.

Key Features:

• 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

Application Fields:

• 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:

Frequently Asked Questions (FAQs)

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.

Request a Quote

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.

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 our customers’ requirements. 

Our customers and partner value our products and services for 2 reasons: excellence and reliability.

Key figures 

A. Over 30 years professional free forging manufacturing experience

B. The company covers an area of 71,000 square meters

C. The construction area of the production workshop is 12,000 square meters

D. Total number of employees of 158

E. 28 engineering and technical personnel 

F. 59 skilled workers 

G. Annual production capacity is 38,000 tons

H. Steel throughput can reach 56,000 tons

Efficient and reliable solutions for customers

Industrial sector application

We design and manufacture forged parts for all industrial areas applying our experience and unique professionalism and taking the specific requirements of the markets into account. This has led us to become a forging industry leader in all industrial segments and collaborating with leading companies.

A. Wind power generation

B. Port Heavy Machinery

C. Mining

D. Ship Building

E. Chemical industrial

F. Oil industrial

G. Metallurgical industry 

H. Hydraulic industry 

I. Other high-end industrial equipment, gearbox body, parts and etc.

Customized solutions 

Modular processes allow us to engineer a solution for almost every industrial application requiring free forged parts. Our modularity means flexibility, a wide range of options, faster delivery, and most important of all, competitiveness.

All our products and production process have been designed to assure excellent, reliable and long lasting unique mechanical performances, resulting in reduced operating costs and long life.

With a wide range of products and a significant experience gained in most industrial applications, we can also provide complete engineering recommendation for customers.