Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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ISO Certified Heavy-Duty 18CrNiMo7-6 Free Forging ,open Die Forged Rotor Shaft. Our ISO-certified rotor shafts are manufactured through heavy-duty open die forging using premium-grade 18CrNiMo7-6 alloy steel, ensuring exceptional mechanical properties and long-term performance under extreme industrial conditions. Designed for high-torque, high-load applications, these forged rotor shafts deliver superior strength, wear resistance, and reliability in demanding environments.
Key Features:
Material: 18CrNiMo7-6 (Alloy Steel, DIN Standard)
Process: Open Die Free Forging
Certification: ISO 9001 / ISO 14001 / ISO 45001
Dimensions: Custom sizes
Heat Treatment: Normalizing, Tempering
Ultrasonic Testing: 100% UT
Machining: Rough machined upon request
Applications: Wind turbine main shafts, large motors, generators, heavy-duty industrial rotors
Advantages:
High core toughness and surface hardness after case hardening
Excellent fatigue resistance and hardenability
Precision forging with tight grain structure for increased durability
Full traceability and mill certification available
Application Industries:
Wind Energy
Power Generation
Heavy Machinery
Marine & Offshore
Metallurgy Equipment
Contact us for customized solutions based on your technical drawings or specific mechanical requirements.
| Item | Details |
|---|---|
| Product Name | ISO Certified Heavy-Duty 18CrNiMo7-6 Free Forging ,open Die Forged Rotor Shaft |
| Material Grades | - Carbon and Alloy Steels: 42CrMo, 18CrNiMo7-6, 20CrNi2Mo, 4340, 35CrMo, 1.7225, 20CrMnTi, 20CrMnMo |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T - Supports large-section open die forging |
| Manufacturing Process | Forging → Heat Treatment → Rough Machining → Dimensional & NDT Inspection |
| Forging Ratio | ≥ 3.0 — Ensures fine grain refinement, enhanced tensile strength, and excellent internal soundness for heavy-duty operation |
| Applications | Precision-forged components for: - Gearbox main shafts - Thrust flanges and coupling hubs - Marine transmission and propulsion shafts - Rudder stocks and steering gear drives - Suitable for both marine and industrial mechanical systems |
| Delivery Conditions | - N+T (Normalized + Tempered): For pre-machined rough parts |
| Testing & Inspection | - Chemical Analysis: Optical Emission Spectrometry - Mechanical Tests: Tensile , Impact , Hardness - NDT: UT , MT - Dimensional Control: Bore dial indicators, precision micrometers |
Process flow:
raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.
With over 25 years of forging expertise, our open die forgings are trusted across a wide range of heavy industries that demand exceptional mechanical performance, large component sizes, and consistent reliability. Our forged components are engineered to perform under extreme loads, harsh environments, and dynamic stress conditions.
Key Application Sectors:
Wind Energy:
Forged shafts, gear blanks, and bearing housings for wind turbine gearboxes, including both onshore and offshore applications.
Offshore & Marine:
High-strength propeller shafts, flanges, and mooring components used in subsea systems, marine propulsion, and ocean engineering.
Industrial Gearboxes & Reducers:
Precision-forged gears, sleeves, and transmission parts for heavy-duty gear reducers in mining, ports, and steel mills.
Oil & Gas Equipment:
Drill tools, BOP parts, and pressure-bearing components forged for durability and fatigue resistance in deep drilling operations.
Construction & Mining Machinery:
Forged cylinders, support arms, and drive components designed for bulldozers, excavators, crushers, and tunneling machines.
Power Generation (Thermal, Hydro, Nuclear):
Forgings for turbine shafts, generator rotors, couplings, and pressure vessel support rings.
Heavy Transportation & Railway:
Axles, couplings, and frame supports for rail, metro, and heavy haul systems.
Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.
2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.
3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.
4. What is your production lead time?
With stock: Around 30 days
Without stock: 40–45 days
5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.
Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.