20CrMo 42CrMo 35CrMo 18CrNiMo7-6 Alloy Steel Forgings For Input Shaft Intermediate Gear Shaft

20CrMo 42CrMo 35CrMo 18CrNiMo7-6 Alloy Steel Forgings For Input Shaft Intermediate Gear Shaft

We specialize in the forging of high-performance alloy steel shafts, including input shafts and intermediate gear shafts, using premium grades such as 20CrMo, 42CrMo, 35CrMo, and 18CrNiMo7-6. These forged components are ideal for transmission systems requiring high strength, fatigue resistance, and dimensional stability under dynamic load conditions.

Material Grades:

• 20CrMo – Carburizing alloy steel with good hardenability, suitable for gears and transmission shafts requiring surface wear resistance and core toughness.

• 42CrMo – Widely used quenched and tempered alloy steel with excellent mechanical strength and impact resistance.

• 35CrMo – A medium carbon low-alloy steel with balanced toughness and strength, ideal for precision shafts.

• 18CrNiMo7-6 – Premium gear steel with deep hardenability, outstanding fatigue strength, and wear resistance after carburizing and hardening.

Product Scope:

• Input shafts for gearboxes and drive assemblies

• Intermediate gear shafts in power transmission systems

• Available as solid, stepped, spline, or custom-shaped shafts

• Supplied in as-forged, rough machined, or pre-machined condition

Key Features:

• Forging weight range: 100–5000 KG

• Superior internal structure with directional grain flow

• Heat treatment options: quenching & tempering, carburizing, normalizing

• 100% Ultrasonic Testing (UT) and MPI

• Dimensional and mechanical inspection with certification

Applications:

• Heavy-duty gearboxes

• Wind power drivetrains

• Mining, metallurgy, and construction machinery

• Truck and industrial transmission systems

• Marine propulsion 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's the typical weight bracket for the forged components you manufacture? Our forging capabilities cover a spectrum from 100 kilograms up to 7 metric tons.

2. Do you handle post-forging processes like thermal treatment and material shaping? Affirmative. We provide comprehensive in-house services for heat treatment, encompassing both preliminary and final machining stages.

3. Which industrial sectors are your primary customers? Our clientele spans various essential industries, including wind power generation, heavy construction equipment, port infrastructure, power transmission systems, and numerous others.

4. What are your standard timelines for manufacturing and delivery? For items readily available in our warehouse, the estimated lead time is approximately 30 days. For custom-produced orders, the typical timeframe is 40 to 45 days.

5. Could you provide information on the geographical placement of your manufacturing facility? Our production plant is located in Changzhou City, which is strategically positioned near Shanghai, and we utilize the shipping facilities at the Port of Shanghai.

Request a Quotation

To receive a detailed cost estimate and a tailored engineering approach, we encourage you to forward your technical blueprints and specific needs to our team for review. We will promptly assess your requirements 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.