Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | ,T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30 days |
| Packaging Details | Pallet |
| Material | 42CrMo, 18CrNiMo7-6 ,4140, 40CrNiMo,37CrMnSiA , 42CrNiMo 45#,35# steel |
| Production Lead time | 30 days |
| Machining | CNC Rough Machining or Forged Blanks |
| Heat Treatment | Normalizing and tempering + Quenching |
| Forging Tolerance | +/-0.1mm |
| Testing | UT & MT |
| Oil Protecting | Provided |
| Hardness | 200-400 HB as Demand |
| HS Code | 84834999 |
| Brand Name | Tiangong |
| Model Number | TG-102 |
| 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 | 30 days | Packaging Details | Pallet |
| Material | 42CrMo, 18CrNiMo7-6 ,4140, 40CrNiMo,37CrMnSiA , 42CrNiMo 45#,35# steel | Production Lead time | 30 days |
| Machining | CNC Rough Machining or Forged Blanks | Heat Treatment | Normalizing and tempering + Quenching |
| Forging Tolerance | +/-0.1mm | Testing | UT & MT |
| Oil Protecting | Provided | Hardness | 200-400 HB as Demand |
| HS Code | 84834999 | Brand Name | Tiangong |
| Model Number | TG-102 | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | Custom Forged Cylinder ，Forged Cylinder 0.1mm tolerance ，open die forging process 400HB | ||
Custom Forged Cylinder Open Die Forging Process Cylinder Sleeve For Industrial Gearbox
Hollow Shaft Forgings :
Our forged hollow shafts are designed for high-performance applications where reduced weight and excellent torsional strength are critical. Manufactured through open die forging or customized mold forging, our hollow shafts offer superior mechanical properties, structural integrity, and dimensional precision.
We produce hollow shafts ranging from 100 kg to 7000 kg, with customized dimensions and internal diameters available upon request.
Reliable Open Die & Closed Die Forgings (100-7000KG) – Direct from Manufacturer
Key Features:
Our forged hollow shafts are designed for high-performance applications where reduced weight and excellent torsional strength are critical. Manufactured through open die forging or customized mold forging, our hollow shafts offer superior mechanical properties, structural integrity, and dimensional precision.
We produce hollow shafts ranging from 100 kg to 7000 kg, with customized dimensions and internal diameters available upon request.
About Our Forging Factory
With more than 30 years of forging experience, we are a leading manufacturer of open die and closed die forgings in China, focusing on components for industrial gearboxes, wind turbines, and port machinery. Our forging range covers parts from 100kg up to 7000kg, produced with 5T, 8T, and 12T electro-hydraulic hammers.
We are the largest long-term supplier to Nanjing High Speed Gear (NGC), providing high-performance gear shafts and blanks with stable quality. We are also the primary forged wheel supplier for ZPMC (Shanghai Zhenhua Port Machinery), with our products exported globally with ZPMC’s port equipment. In the wind energy sector, we supply forged components to leading companies such as Goldwind, Mingyang, and Southern Aerospace.
We operate a fully equipped in-house testing laboratory to ensure quality, and offer optional rough machining, heat treatment, and UT/MT inspections. Our manufacturing is certified under ISO 9001, ISO 14001, and ISO 45001 standards.
| Material | 4140,4130,18CrNiMo7-6,4340,4330,1.7225,35# 45# 20CrMnTi 20CrNi2Mo 20CrMnMo 18CrNiMo7-6 42CrMo 20CrNo 35CrMo |
| 5 TON, 8 TON, 12 TON Hydralic hammer | |
| Apply for | Transmission main shaft is used for driving force |
| Forging+heat treatment+rough machining+finish machining | |
| Forging ratio | ≥3 |
| Applicable standard | ASTM,ASME,DIN,JIS,ISO,BS,API,EN |
| Executive standard | JB/GB/EN/DIN/JIS/ASME/ASTM/ISO |
| Delivery terms | Rough machining(N+T); finish machining(Q+T) |
| Test equipment | Spectrograph, UT device, tensile and impact test machine, metalloscope,external micrometer, bore dial indicator, hardness testing device and so on. |
| Service | Our service included the forging, process, heat treatment, finish machining, package, local logistics, customers clearance and maritime transport. We took the customer’s requirements as the principal thing, and pay attention on the products quality. |
More products we are producing:
We have our Own Inspection Lab:
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 |
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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