Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Application | Wind power, port machinery, mining and oil extraction |
| Quality Control | Ultrasonic tested (UT) & Mechanical Properties |
| Material | 42CrMo4 or Customized |
| Production Process | Forging |
| Hardness | Customized according to customer requirements |
| Surface Finish | Smooth |
| Heat Treatment | Annealing and tempering |
| Size | Customized according to drawings |
| Brand Name | Tiangong |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 56000 Tons per year |
| Delivery Time | 30days | Packaging Details | Pallet |
| Application | Wind power, port machinery, mining and oil extraction | Quality Control | Ultrasonic tested (UT) & Mechanical Properties |
| Material | 42CrMo4 or Customized | Production Process | Forging |
| Hardness | Customized according to customer requirements | Surface Finish | Smooth |
| Heat Treatment | Annealing and tempering | Size | Customized according to drawings |
| Brand Name | Tiangong | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | 20crmnmo alloy forging blank ，18crnimo7-6 gear forging ，18crnimo7-6 alloy forging blank | ||
18CrNiMo7-6 20CrMnMo Alloy Steel Forging Blank For Sun Gear Planetary Gear. Our 18CrNiMo7-6 and 20CrMnMo alloy steel forging blanks are the foundational material for high-performance sun and planetary gears. Meticulously forged, these blanks deliver exceptional strength, toughness, and fatigue resistance, ensuring the final gears withstand extreme torque and continuous operation in demanding power transmission systems.
These alloy steel forged blanks are indispensable for sun and planetary gears in a wide range of heavy-duty and high-precision applications:
| Item | Details |
|---|---|
| Product Name | 18CrNiMo7-6 20CrMnMo Alloy Steel Forging Blank For Sun Gear Planetary Gear |
| Material Grades | - Case-hardening alloy steel: 18CrNiMo7-6 - Known for high tensile strength, excellent core toughness, and superior wear resistance after heat treatment - Optimized for surface carburizing and deep hardening applications in rotating power components |
| Forging Equipment | - Hydraulic Hammers: 5T, 8T, 12T - Supports custom open die forging for long shafts and stepped blanks - Suitable for heavy-duty transmission elements with complex geometries |
| Manufacturing Process | Forging → Heat Treatment → Rough Machining → Finish Machining (optional) → Dimensional & Ultrasonic Inspection |
| Forging Ratio | ≥ 3.0 — Promotes fine grain structure, uniform fiber alignment, and improved fatigue life under high-speed rotational and torsional loads |
| Applications | Forged blanks engineered for: - Transmission shafts, gear blanks, coupling hubs, spline drives - Used in heavy machinery, mechanical gearboxes, metallurgical drives, and wind turbine systems - Withstands high torque, cyclic loading, and localized surface fatigue |
| Heat Treatment Options | - Carburized + Quenched + Tempered: Delivers hardened wear-resistant surface and tough, ductile core - Optional normalization or stress relieving for intermediate machining steps |
| Testing & Inspection | - Chemical Analysis: Checked using optical spectrometry - Mechanical Testing: Tensile strength, impact toughness, and hardness values - Ultrasonic Testing: Ensures no internal cracks or segregations - Dimensional Checks: Bore, runout, and parallelism control tools |
| Value-Added Services | - Precision Shafts: Custom-Made, Prepped & Delivered We offer custom shaft lengths, stepped profiles, and bore dimensions. Each piece features CNC pre-machining, anti-rust protection, and batch identification, with full logistics coordination for all deliveries. |
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 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.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
1994
Total Annual:
27.5 million -28 million
Employee Number:
135~150
Ecer Certification：
Verified Supplier
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 ... 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 ...
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