Heavy-Duty 42CrMo Cylindrical Steel Forging Blank for Industrial Equipment. The Heavy-Duty 42CrMo Cylindrical Steel Forging Blank is a high-strength, hot-forged component specifically designed for use in industrial equipment subjected to extreme mechanical loads. Manufactured from premium 42CrMo alloy steel, this forging blank offers excellent tensile strength, impact resistance, and hardenability—making it ideal for shafts, sleeves, rollers, and other critical rotary or structural parts.

What is it?

The Heavy-Duty 42CrMo Cylindrical Steel Forging Blank is a hot-forged, semi-finished component made from high-strength alloy steel (42CrMo / AISI 4140), specifically engineered for use in large industrial equipment. This cylindrical blank serves as a critical precursor to precision-machined parts such as main shafts, drive axles, and rotary components across heavy-duty applications.

Key Features

• High Strength & Toughness: 42CrMo alloy provides exceptional tensile strength, hardenability, and impact resistance, ideal for dynamic and torsional load conditions.

• Optimized Grain Flow: Forged along the axis to enhance fatigue resistance and structural integrity under high-cycle stress.

• Heat Treatable: Supports quenching and tempering to achieve customized mechanical properties.

• Dimensional Versatility: Available in various diameters and lengths, suitable for 1–6 MW wind turbines and heavy-duty rotary systems.

• Excellent Machinability: Suitable for rough and precision machining, with optional pre-machined features such as center holes and keyways.

Available Types

1. 1. 1. Solid Cylindrical Forging Blanks
         For general-purpose machining, commonly used as the base for shafts or rollers.

      2. Pre-Machined Shaft Blanks
         With rough-turned surfaces and center holes, designed for easier downstream processing and alignment.

      3. Long-Length Forged Blanks
         Suitable for turbine main shafts and drive shafts exceeding 3000 mm in length.

      4. Custom Profiled Cylindrical Blanks
         Tailored with journals, flanges, or keyways according to OEM design requirements.

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 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.