Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
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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 | Rough-Machined Stress-Relieved Steel Forging Blank for Hydraulic Cylinders |
| 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.