Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Surface Treatment | Heat Treatment，Descaling and polishing |
| Size | Customized |
| Material | Carbon steel:35# 45# |
| Weight | Customized |
| Type | Forged shaft |
| Application | Marine Drives |
| Processing Method | Forging，Heat Treatment |
| Packing | Wooden Case |
| 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 |
| Surface Treatment | Heat Treatment，Descaling and polishing | Size | Customized |
| Material | Carbon steel:35# 45# | Weight | Customized |
| Type | Forged shaft | Application | Marine Drives |
| Processing Method | Forging，Heat Treatment | Packing | Wooden Case |
| Brand Name | Tiangong | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | Large Size hardened steel shaft 35# ，hardened steel shaft Carbon Steel 45# ，steel shaft for Marine | ||
Large Size Carbon Steel 35# 45# Gear Shaft for Marine Drives. Engineered for high-load marine transmission systems, our large-size gear shafts made from 35# and 45# carbon steel are forged to ensure exceptional strength, stability, and reliability under harsh marine conditions. These shafts are ideal for propulsion gearboxes, rudder systems, and other marine power components requiring robust torque transmission.
| Property | 35# Steel | 45# Steel |
|---|---|---|
| Tensile Strength | ≥610 MPa | ≥650 MPa |
| Yield Strength | ≥370 MPa | ≥420 MPa |
| Elongation | ≥16% | ≥14% |
| Impact Toughness | Good ductility | High toughness |
| Item | Details |
|---|---|
| Product Name | Large Size Carbon Steel 35# 45# Gear Shaft for Marine Drives |
| Materials | 35# 45# or per customer specification |
| Forging Method | Open-die forging,Free forging |
| Heat Treatment | Carburizing, Tempering, Normalizing |
| Applications | Marine Drives |
| Surface Condition | Rough machined, or as-forged |
| Inspection | UT, MT, Hardness Test, Mechanical Properties, Dimensional Check |
| Customization | Available upon drawing or specification |
Material: Available in 35# and 45# carbon steel, known for stable mechanical properties and easy processing
Application-Specific Sizing: Customizable large dimensions to fit a variety of marine gear transmission systems
Heat Treatment Options: Normalizing, and tempering available to improve hardness and wear resistance
Strong Torque Transmission: High structural integrity to handle continuous power loads in marine operations
Forged for Strength: Superior grain structure and minimized internal defects enhance fatigue resistance
Cost-Effective Strength: Carbon steel provides a balance of strength and affordability for large components
Improved Gear Engagement: Precision-machined to ensure smooth meshing and minimal vibration
Long Service Life: Designed to perform under prolonged exposure to saltwater, vibration, and mechanical stress
Adaptable Design: Suitable for both propulsion systems and auxiliary marine gear units
Marine reduction gears
Propeller shaft drives
Shipboard power transmission systems
Heavy-duty fishing vessels and cargo ships
Robust and reliable, this carbon steel gear shaft is an ideal solution for marine engineers and OEMs seeking dependable components for heavy marine propulsion and drive train assemblies.
The steel forgings production flow:
Raw material steel ingot into warehouse(test the chemical composition) → Cutting→ Heating(Furnace temperature test) → Heat treatment after forging(Furnace temperature test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal dimension, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment.
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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