Large Diameter Rough Machined Heavy Steel Forgings for Rolling Mill Components. Our large diameter rough machined heavy steel forgings are engineered to meet the demanding needs of rolling mill systems. These components are designed to withstand extreme mechanical stress, repeated thermal cycling, and high torque during continuous operation. Forged from high-strength alloy steels and processed with precision open die techniques, they ensure superior structural integrity and service life.

Key Features:

• Large Diameter Capability: Forgings available up to 1700 mm in outer diameter and up to 7 tons per piece, suitable for rolling mill work rolls, and shafts.

• High Structural Strength: Forging ratio ≥ 3.0 ensures dense grain flow and enhanced mechanical properties under heavy rolling and compressive forces.

• Rough Machined Finish: Delivered in rough-machined condition, allowing for custom final machining based on assembly needs and tolerances.

• Thermal and Mechanical Stability: Optimized heat treatment improves core toughness, fatigue resistance, and dimensional stability under high temperatures.

Applications:

• Work roll and backup roll shafts for hot and cold rolling mills

• Transmission components for plate and strip rolling equipment

• Housing parts and support structures for steel and aluminum rolling mills

• Gear and coupling blanks for rolling line drive systems

Process flow:

raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.

Frequently Asked Questions (FAQs)

1. Forging Weight Range: From 100 kg to 7000 kg, covering diverse industrial needs.
2. Services Offered: In - house heat treatment, rough and finish machining for one - stop solutions.
3. Target Industries: Serving wind energy, heavy equipment, port machinery, transmission systems, etc.
4. Production Lead Time: With stock: around 30 days; Without stock: 40 - 45 days.
5. Factory Location: Based in Changzhou City, near Shanghai, shipping via Shanghai Port.

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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.