18CrNiMo7-6,4140, 42CrMo4 Carbon Steel Alloy Steel for Industrial Gears Drive

Industrial Drive Shaft Forged from 4140/42CrMo4 Steel for Wind & Port Machinery. Our industrial drive shafts are precision-forged from high-quality 4140 / 42CrMo4 alloy steel, known for their excellent toughness, fatigue resistance, and high tensile strength. These forged components are engineered to meet the rigorous demands of heavy-duty applications, especially in wind power systems, port handling equipment, and marine machinery.

Key Features:

• Material: Premium 4140 / 42CrMo4 alloy steel for optimal mechanical properties

• Process: Free forging or die forging with strict metallurgical controls

• Applications: Wind turbine gearboxes, port cranes, heavy-duty industrial transmissions

• Heat Treatment: Normalizing, quenching, and tempering for maximum durability

• Customization: Sizes and specifications tailored to your exact needs

• Standards: ISO 9001, ISO 14001, ISO 45001 certified manufacturing process

Advantages:

• High strength and toughness

• Excellent fatigue and wear resistance

• Custom sizes and machining available

• OEM/ODM service based on drawings

Specifications

• Weight Range: 100 kg – 7 tons (customized to accommodate both medium-size drive shafts and large-section marine components)

• Machining-Ready Surface: Delivered with precise allowances for final CNC finishing

• Grain Structure: Refined through forging ratio ≥3.0 and controlled heat treatment

• Dimensional Tolerance: Custom tolerances per project needs

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. 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.