Hydropower Spindle Forged Shaft 42CrMo4 18CrNiMo7-6 Turbine Main Shafts

Hydropower spindle forgings 42CrMo4 18CrNiMo7-6 for turbine main shafts

Hydropower spindle forgings 42CrMo4 18CrNiMo7-6 for turbine main shafts. Our hydropower spindle forgings are engineered for the main shafts of hydro turbine units, where superior strength, fatigue resistance, and dimensional stability are essential. Manufactured by precision free forging techniques, these forgings ensure optimal grain flow and internal soundness, providing excellent mechanical performance under high loads and rotational forces.

We utilize premium-grade alloy steels such as42CrMo4, 18CrNiMo7-6, selected for their exceptional toughness, hardenability, and thermal stability. Each forging undergoes rigorous heat treatment and quality control processes, including ultrasonic testing (UT), magnetic particle inspection (MT), and optional rough or finish machining.

Application Scenarios:

• Main rotor shafts for hydropower turbines

• Vertical and horizontal hydroelectric generator shafts

• High-load transmission shafts in large-scale power stations

Our forged hydropower spindles are trusted by leading hydropower equipment manufacturers for their long-term stability and performance. With more than 25 years of forging experience and a fully equipped in-house testing laboratory, we deliver precision and reliability from forging to final delivery.

These are the main inspection equipments:

We operate a fully equipped in-house laboratory dedicated to mechanical, chemical, and metallurgical testing. This allows us to perform real-time quality checks throughout the entire production process—from raw material selection to final inspection.

Our laboratory testing equipment includes:

• Spectral Component Analyzer – for chemical composition analysis

• Hydraulic Universal Testing Machine – for tensile and yield strength testing

• Impact Strength Testing Machine with Cryogenic Tank – for room temperature and low-temperature impact testing

• Brinell & Rockwell Hardness Testers – to assess surface and core hardness

• Ultrasonic Flaw Detector – for internal defect detection (UT)

• Metallurgical Microscope – for grain structure and heat treatment evaluation

• Program-Controlled Box Furnace – for heat treatment simulations and metallurgical testing

The steel forgings production 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 minimum and maximum forging weight?

We produce forged components ranging from 100kg to 7000kg.

2.Can you provide heat treatment and machining services?
Yes, we offer full in-house heat treatment and rough/final machining.

3.What industries do you serve?
Wind energy, heavy machinery, port equipment, power transmission, and more.

4.What is the lead time of your production?
If we have material in stock, lead time is around 30 days. If no material in stock, around 40-45 days.

5.Where are you located?
Our factory located in Changzhou City, Neaby Shanghai. Our nearest port is 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.