Closed Die Forged Steel Flanges OEM Open Forging Process For Gearbox

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

Our Large Size Forged Ring Flanges are manufactured from premium-grade alloy steels such as 18CrNiMo7-6 and 42CrMo, ensuring exceptional strength, wear resistance, and durability. Designed for heavy-duty industrial applications, these forged flanges are ideal for wind turbine gearboxes, marine equipment, port machinery, and large-scale transmission systems. With a gross weight capacity of up to 7 tons, each ring flange undergoes open die forging, followed by precise heat treatment and CNC machining to meet tight tolerance requirements.

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

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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.