Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Application | Hydraulic Cylinders |
| Quality Control | Ultrasonic tested (UT) |
| Material | 42CrMo, 45#, 35# or Customized |
| Production Process | Forging ，roughing |
| Hardness | Customized |
| 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 | Hydraulic Cylinders | Quality Control | Ultrasonic tested (UT) |
| Material | 42CrMo, 45#, 35# or Customized | Production Process | Forging ，roughing |
| Hardness | Customized | 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 | high load steel forging blank ，42crmo steel forging blank ，42crmo steel forging parts | ||
Material Options: 42CrMo, 45#, 35#, or other customized grades
Stress-Relief Treatment: Minimizes internal stress for enhanced dimensional stability during final machining
Rough Machining: Pre-machined surfaces (inner/outer diameter, end faces) reduce customer processing time
Hydraulic cylinder barrels, end caps, and rod guides
Suitable for use in construction machinery, mining equipment, industrial presses, and marine hydraulics
Designed to handle high-pressure environments, axial loads, and dynamic movement cycles
| Item | Details |
|---|---|
| Product Name | 42CrMo Steel Forging Blanks – High Load, Stress Relieved Forged Parts |
| Material Grades | - High-strength carbon steels: 35#, 45#, customized grades available - Excellent tensile strength, impact toughness, and fatigue resistance - Designed for thick-walled or bored hydraulic cylinder components under cyclic pressure |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T - Large open-die forging press with optional axial core boring - Supports near-net shape forging of cylinder barrels and end closures |
| Manufacturing Process | Hot Forging → Intermediate Heat Treatment → Optional Core Boring / Drilling → Rough Machining → UT & Dimensional Inspection |
| Forging Ratio | ≥ 3.0 — Enhances grain flow along cylinder axis, improving fatigue resistance and sealing surface stability |
| Applications | - Cylinder barrels, end caps, glands, and rod guides for hydraulic systems - Used in construction machinery, presses, marine hydraulics, and mining equipment - Suitable for high-pressure, heavy-load, and repeated motion conditions |
| Heat Treatment Options | - Tempered for high strength and internal hardness - Stress relief applied after forging to reduce residual stress before final machining |
| Testing & Inspection | - Chemical: Spectrometer-controlled composition analysis - Mechanical: Hardness, tensile, yield, impact toughness - Ultrasonic (UT): Multi-angle flaw detection, focused on critical bore and seal areas - Dimensional: Outer/inner diameter, length, wall thickness, concentricity, and straightness |
| Value-Added Services | - Customized bore diameter, wall profile, and external features - Rough-machined ends, grooves, or counterbores ready for final machining - Anti-rust coating, protective caps, steel banding, and export crate packaging - Laser part marking, OEM branding, and full traceability documentation |
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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