Precision Forged Steel Cylinder 42CrMo 20CrMnMo CNC Machined Rough Finished forge cnc

Precision Forged Steel Cylinder – 42CrMo / 20CrMnMo – CNC Machined or Rough Finished

Our Precision Forged Steel Cylinders are manufactured using open die forging processes and are available in either CNC machined or rough finished conditions. Made from premium-grade 42CrMo and 20CrMnMo alloy steels, these cylinders offer excellent tensile strength, impact resistance, and dimensional stability, making them ideal for gearboxes, hydraulic systems, marine applications, and industrial machinery.

Each forged cylinder is customized according to client specifications, with weights ranging from 100kg to 7000kg. We provide complete services including heat treatment (quenching, tempering), ultrasonic testing (UT), and mechanical property certification. Our cylinders are widely used by OEMs in the wind energy, port equipment, and power transmission sectors.

All components comply with ISO9001, DIN, and GB standards, ensuring long service life and stable performance in harsh operating environments.

Available Shapes:

• Cylindrical forgings: solid round bars or hollow cylinders

• Forged shafts: straight, stepped, or spline shafts

• Gear blanks: round discs with or without hubs, pre-machined or rough

• Block forgings: rectangular, square, or custom-shaped blocks for heavy-duty applications

Material Grades (examples):

• 42CrMo / 42CrNiMo / 18CrNiMo7-6 – high-strength alloy steels for mechanical parts

• 20CrMnTi – carburizing and quenching steels for gears

Key Features:

• Custom forging weight range: 100 KG to 7000 KG

• Superior mechanical properties after heat treatment

• Uniform internal structure, no porosity or segregation

• 100% ultrasonic tested, with optional third-party inspection

• CNC pre-machining and surface treatment available upon request

Applications:

• Wind power equipment (shafts, gear blanks)

• Heavy machinery and transmission systems

• Mining, port, and oilfield equipment

• Power generation and shipbuilding industries

• Hydraulic systems and pressure equipment

The steel forgings production flow:

Raw material steel ingot into warehouse(test the chemical composition) → Cutting→ Heating(Furnace temperature test) → Heat treatment after forging(Furnace temperature test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal dimension, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment.

Frequently Asked Questions (FAQs)

1. What is the typical weight spectrum of the forged components you manufacture? Our forging capabilities encompass a range of components weighing from 100 kilograms up to 7 metric tons.

2. Do you handle downstream processing such as thermal treatment and material removal? Indeed, we provide comprehensive in-house services for heat treatment, encompassing both preliminary and final machining operations.

3. Which industrial sectors are the primary beneficiaries of your forged products? We cater to a diverse array of critical industries, including wind power generation, heavy machinery manufacturing, port infrastructure, power transmission systems, and various others.

4. What are the typical timeframes for the completion and dispatch of orders? For items readily available in our inventory, the standard lead time is approximately 30 days. For custom-manufactured orders, the timeframe generally spans 40 to 45 days.

5. Could you provide information on the geographical location of your manufacturing facility and shipping hub? Our production plant is situated in Changzhou City, strategically located near Shanghai, and we utilize the Port of Shanghai for our shipping logistics.

Request a Quotation

To receive a tailored price assessment and a comprehensive engineering solution designed to meet your specific needs, please forward your detailed technical drawings and requirements to our dedicated team. Our experienced engineers will promptly review your submission and provide you with a professional quotation and a suitable solution.

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.