ISO Forged Shaft Heavy Duty 18CrNiMo7-6 Free Forging Open Die Forged Rotor Shaft

ISO Certified Heavy-Duty 18CrNiMo7-6 Free Forging ,open Die Forged Rotor Shaft. Our ISO-certified rotor shafts are manufactured through heavy-duty open die forging using premium-grade 18CrNiMo7-6 alloy steel, ensuring exceptional mechanical properties and long-term performance under extreme industrial conditions. Designed for high-torque, high-load applications, these forged rotor shafts deliver superior strength, wear resistance, and reliability in demanding environments.

Key Features:

• Material: 18CrNiMo7-6 (Alloy Steel, DIN Standard)

• Process: Open Die Free Forging

• Certification: ISO 9001 / ISO 14001 / ISO 45001

• Dimensions: Custom sizes

• Heat Treatment: Normalizing, Tempering

• Ultrasonic Testing: 100% UT

• Machining: Rough machined upon request

• Applications: Wind turbine main shafts, large motors, generators, heavy-duty industrial rotors

Advantages:

• High core toughness and surface hardness after case hardening

• Excellent fatigue resistance and hardenability

• Precision forging with tight grain structure for increased durability

• Full traceability and mill certification available

Application Industries:

• Wind Energy

• Power Generation

• Heavy Machinery

• Marine & Offshore

• Metallurgy Equipment

Contact us for customized solutions based on your technical drawings or specific mechanical requirements.

Process flow:

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

Applications of Our Open Die Forgings

With over 25 years of forging expertise, our open die forgings are trusted across a wide range of heavy industries that demand exceptional mechanical performance, large component sizes, and consistent reliability. Our forged components are engineered to perform under extreme loads, harsh environments, and dynamic stress conditions.

Key Application Sectors:

• Wind Energy:
  Forged shafts, gear blanks, and bearing housings for wind turbine gearboxes, including both onshore and offshore applications.

• Offshore & Marine:
  High-strength propeller shafts, flanges, and mooring components used in subsea systems, marine propulsion, and ocean engineering.

• Industrial Gearboxes & Reducers:
  Precision-forged gears, sleeves, and transmission parts for heavy-duty gear reducers in mining, ports, and steel mills.

• Oil & Gas Equipment:
  Drill tools, BOP parts, and pressure-bearing components forged for durability and fatigue resistance in deep drilling operations.

• Construction & Mining Machinery:
  Forged cylinders, support arms, and drive components designed for bulldozers, excavators, crushers, and tunneling machines.

• Power Generation (Thermal, Hydro, Nuclear):
  Forgings for turbine shafts, generator rotors, couplings, and pressure vessel support rings.

• Heavy Transportation & Railway:
  Axles, couplings, and frame supports for rail, metro, and heavy haul systems.

Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.

2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.

3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.

4. What is your production lead time?

With stock: Around 30 days

Without stock: 40–45 days

5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.

Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.

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.