42CrNiMo C45 Forged Steel Flanges Polished Open Forging OEM

Product Specification

Forged Steel Flange 42CrNiMo / C45 – Gearbox and Crane Components – OEM Available

ur Large Size Forged Ring Flanges are manufactured from high-performance alloy steels such as 18CrNiMo7-6 and 42CrMo, ensuring exceptional strength, fatigue resistance, and toughness under extreme working conditions. With a gross weight range from 100kg up to 7000kg, these forged flanges are ideal for wind turbine gearboxes, large-scale industrial gear transmission, marine propulsion systems, and port handling equipment.

Each flange is produced using open die forging techniques, followed by controlled heat treatment (normalizing, quenching, tempering) and precision CNC machining. We offer OEM and custom production according to customer drawings and mechanical specifications.

All products are ultrasonically tested (UT) and comply with international standards such as DIN, GB, and ISO9001. Our flanges are trusted by global leaders in the renewable energy, port machinery, and heavy equipment manufacturing industries.

We support custom dimensions, heat treatment specifications, and machining processes based on customer drawings or technical requirements. With over 25 years of forging expertise, our flanges comply with ISO, GB, and DIN standards, and are ultrasonically tested for internal quality assurance. Trusted by top-tier clients in wind energy and port equipment sectors.

Key Features:

• Material: 42CrMo, 42CrNiMo, 18CrNiMo7-6, 20CrMnMo, C45, C35

• Forging Type: Open die / Closed die

• Weight Range: 100kg – 7000kg

• Heat Treatment: Normalizing, Quenching + Tempering

• Machining: Rough / Semi-finished / Precision CNC

• Standards: Custom / GB / DIN / ANSI

• Applications: Wind turbines, port cranes, gearboxes, engineering machinery

Custom 42CrMo / 42CrNiMo / 18CrNiMo Forged Shafts, drives for Wind Turbine Gearboxes (100–1000KG). We manufacture custom forged shafts and drive components made from premium alloy steels including 42CrMo, 42CrNiMo, and 18CrNiMo, specifically engineered for wind turbine gearbox applications. These forged parts range from 100KG to 1000KG, and can be tailored to meet your exact design and performance requirements.

Material Options:

• 42CrMo – A high-strength alloy steel with excellent toughness and hardenability, widely used for heavy-duty drive shafts.

• 42CrNiMo – A nickel-molybdenum alloy steel offering superior impact resistance and stability in harsh, low-temperature environments.

• 18CrNiMo – A carburizing alloy steel combining high surface wear resistance with strong core toughness, ideal for long-life gear shafts

  

  
  

  
  

Key Features:

• Weight range: 100–1000KG

• Available in various shapes: stepped shafts, spline shafts, solid or hollow structures

• Forged and heat-treated for enhanced mechanical properties

• CNC pre-machining or rough machining available upon request

• 100% Ultrasonic testing and Magnetic Particle Inspection

Applications:

• Main shafts and input/output shafts in wind turbine gearboxes

• High-torque drive components in renewable energy systems

• Custom transmission shafts for planetary and parallel gear reducers

• Offshore and onshore wind power equipment

Manufacturing Process:

The shafts are produced using open die forging or precision closed die forging, followed by appropriate heat treatment such as quenching & tempering or carburizing. Each part is processed to achieve optimized grain flow and superior fatigue resistance. All products are strictly inspected and can be delivered with pre-machined surfaces to facilitate your final assembly or finish machining.