This 42CrMo Ultrasonic-tested Heavy Steel Forging For Gantry Container Crane Wheels is specifically engineered for use in overhead crane wheels, gantry crane trolleys, and rail-driven lifting systems, where high impact resistance, load-bearing capacity, and dimensional integrity are crucial.

Forged from high-strength 42CrMo alloy steel, the component undergoes open die forging, Q+T heat treatment, and ultrasonic testing (UT) to ensure a dense internal structure and eliminate subsurface defects. Its excellent toughness and wear resistance make it ideal for wheel rims, hubs, and rail-contacting surfaces subjected to cyclic stress and abrasive environments.

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

• Tensile Strength & Toughness: Tuned to meet ship classification society requirements

• Dimensional Tolerance: Custom tolerances per project needs

Application

This product is optimized for:

• Crane traveling wheels and drive wheels in metallurgical plants

• Trolley wheels in container gantry cranes at ports and terminals

• Rail wheel components for heavy lifting assemblies in mining or hydropower sectors

• Forged hubs for steel mill cranes operating under high temperature and shock environments

Advantages:

High Strength & Toughness

• 42CrMo alloy steel offers an ideal balance of high tensile strength, ductility, and impact resistance, enabling safe operation under sudden loading and high-frequency braking in crane systems.

Ultrasonic Tested for Internal Integrity

• Each forging undergoes ultrasonic inspection, ensuring defect-free structure with no internal cracks, shrinkage cavities, or inclusions—critical for rotating components like crane wheels.

Enhanced Wear Resistance

• Through quenching and tempering (Q+T) treatment, the forging achieves , significantly reducing wear at the wheel-rail interface and extending service life in abrasive environments.

Optimized Grain Flow

• The controlled forging ratio (≥3.0) ensures grain alignment along stress paths, improving fatigue resistance and reducing the risk of fracture or deformation under heavy cyclic loads.

Precision Machinability

• Material composition and thermal refinement allow high-precision CNC machining, enabling tight tolerance control for wheel hubs, bores, and flanges to match complex crane drive designs.

Reliable Performance in Harsh Conditions

• Suitable for extreme operating environments, such as steel mills, port gantry cranes, and mining hoists, where equipment faces high thermal cycles, shocks, and corrosive exposure.

Customization-Friendly

• Available in various sizes, machining states (rough/finish), and bore/keyway configurations, the forging can be tailored to specific crane models or OEM requirements.

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. Forging Weight Range: We produce forged parts from 100 kg to 7000 kg, covering diverse needs.
2. Services: Yes, we offer in - house heat treatment, rough and finish machining, ensuring quality and efficiency.
3. Served Industries: Our products supply wind energy, heavy equipment, port machinery, transmission systems, etc.
4. Production Lead Time:
   • With stock: About 30 days.
   • Without stock: 40–45 days.
5. Factory Location: Located in Changzhou City near Shanghai, shipping via Shanghai Port for convenience.

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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.