Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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Hydropower spindle forgings 42CrMo4 18CrNiMo7-6 for turbine main shafts
Hydropower spindle forgings 42CrMo4 18CrNiMo7-6 for turbine main shafts. Our hydropower spindle forgings are engineered for the main shafts of hydro turbine units, where superior strength, fatigue resistance, and dimensional stability are essential. Manufactured by precision free forging techniques, these forgings ensure optimal grain flow and internal soundness, providing excellent mechanical performance under high loads and rotational forces.
We utilize premium-grade alloy steels such as42CrMo4, 18CrNiMo7-6, selected for their exceptional toughness, hardenability, and thermal stability. Each forging undergoes rigorous heat treatment and quality control processes, including ultrasonic testing (UT), magnetic particle inspection (MT), and optional rough or finish machining.
| Item | Details |
|---|---|
| Product Name | Hydropower spindle forgings 42CrMo4 18CrNiMo7-6 for turbine main shafts |
| Material Grades | 42CrMo4 18CrNiMo7-6 |
| 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 | turbine main shafts |
| Delivery Conditions | - N+T (Normalized + Tempered): For pre-machined rough parts |
| Testing & Inspection | - Chemical Analysis: Optical Emission Spectrometry - Mechanical Tests: Tensile , Impact - NDT: UT , MT - Dimensional Control: Bore dial indicators, precision micrometers - Metallography: Grain size & microstructure |
Main rotor shafts for hydropower turbines
Vertical and horizontal hydroelectric generator shafts
High-load transmission shafts in large-scale power stations
Our forged hydropower spindles are trusted by leading hydropower equipment manufacturers for their long-term stability and performance. With more than 25 years of forging experience and a fully equipped in-house testing laboratory, we deliver precision and reliability from forging to final delivery.
These are the main inspection equipments:
We operate a fully equipped in-house laboratory dedicated to mechanical, chemical, and metallurgical testing. This allows us to perform real-time quality checks throughout the entire production process—from raw material selection to final inspection.
Our laboratory testing equipment includes:
Spectral Component Analyzer – for chemical composition analysis
Hydraulic Universal Testing Machine – for tensile and yield strength testing
Impact Strength Testing Machine with Cryogenic Tank – for room temperature and low-temperature impact testing
Brinell & Rockwell Hardness Testers – to assess surface and core hardness
Ultrasonic Flaw Detector – for internal defect detection (UT)
Metallurgical Microscope – for grain structure and heat treatment evaluation
Program-Controlled Box Furnace – for heat treatment simulations and metallurgical testing
| Our Lab inspection equipment | |
| 1 | Spectral component analyzer |
| 2 | Impact strength testing machine |
| 3 | Impact test cryogenic tank |
| 4 | Ultrasonic flaw detector |
| 5 | Brinell hardness tester |
| 6 | Rockwell hardness tester |
| 7 | Digital hydraulic universal testing machine |
| 8 | H.Metallurgical microscope |
| 9 | Program-controlled box furnace |
The steel forgings production flow:
raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.
Frequently Asked Questions (FAQs)
1.What is your minimum and maximum forging weight?
We produce forged components ranging from 100kg to 7000kg.
2.Can you provide heat treatment and machining services?
Yes, we offer full in-house heat treatment and rough/final machining.
3.What industries do you serve?
Wind energy, heavy machinery, port equipment, power transmission, and more.
4.What is the lead time of your production?
If we have material in stock, lead time is around 30 days. If no material in stock, around 40-45 days.
5.Where are you located?
Our factory located in Changzhou City, Neaby Shanghai. Our nearest port is 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.