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，Removal of oxide scale or Customized |
| Material | 42CrMo4, 20CrMnTi or Customized |
| Weight | 100 KG-7 TON |
| Type | Free Forging |
| Application | Output shafts in industrial gear reducers, rolling mills, cement drives, and mixers - Main drive shafts for mining conveyors and metallurgical processing units - Rotational components operating under high torque and cyclical loads |
| Packing | Pallet or Customized |
| Shape | Customizable |
| Durability | Long-lasting |
| Brand Name | Tian Gong |
| 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，Removal of oxide scale or Customized | Material | 42CrMo4, 20CrMnTi or Customized |
| Weight | 100 KG-7 TON | Type | Free Forging |
| Application | Output shafts in industrial gear reducers, rolling mills, cement drives, and mixers - Main drive shafts for mining conveyors and metallurgical processing units - Rotational components operating under high torque and cyclical loads | Packing | Pallet or Customized |
| Shape | Customizable | Durability | Long-lasting |
| Brand Name | Tian Gong | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | Hydraulic Free forging ，Press Systems Free forging ，Cylinder Block 20CrMnTi | ||
Free Forged Cylinder Block for Heavy-Duty Hydraulic Press Systems. Our free forged cylinder blocks are engineered for use in high-pressure, heavy-duty hydraulic press systems, delivering superior strength, dimensional integrity, and long service life under extreme working conditions. Forged from high-quality carbon or alloy steels, these blocks are designed to withstand high internal pressure and cyclic loading in forging, extrusion, and forming equipment.
Key Features:
Material Options: High-strength alloy steels (e.g., 42CrMo) and carbon steels (e.g., 45#) with excellent mechanical performance, pressure resistance, and machinability.
Forging Process: Precision open-die (free) forging to produce dense, defect-free blocks with refined grain structure and optimal strength in critical stress zones.
Dimensional Range: Customizable dimensions to suit hydraulic cylinder sizes from medium to ultra-large presses.
Heat Treatment: Quenching & tempering or normalizing options ensure improved hardness, toughness, and fatigue life in pressurized environments.
Applications:
Main cylinder blocks in hydraulic forging presses
Extrusion press cylinder housings
Heavy-load hydraulic systems in metallurgy, shipbuilding, energy, and forming equipment
| Item | Details |
|---|---|
| Product Name | Free Forged Cylinder Block for Heavy-Duty Hydraulic Press Systems |
| Material Grades | - Alloy steels: 42CrMo - Carbon steels: 45# - Excellent pressure resistance, toughness, and dimensional stability for high-load applications |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T - 3600T open-die forging press for large-size, solid cylinder blocks - Capable of forming integral profiles with deep central bores, sealing grooves, and flange interfaces |
| Manufacturing Process | Hot Forging → Heat Treatment (Quenching + Tempering / Normalizing) → Ultrasonic Testing → Rough / Semi-Finish Machining → Final Dimensional & Surface Inspection |
| Forging Ratio | ≥ 3.0 — Ensures uniform grain flow for improved fatigue strength, internal soundness, and pressure containment in hydraulic applications |
| Applications | - Cylinder blocks for hydraulic forging and extrusion presses - Main pressure chambers in metallurgical, shipbuilding, and heavy forming equipment - Load-bearing cylinders in energy sector and industrial hydraulic systems |
| Heat Treatment Options | - Quenched + Tempered for optimal mechanical strength and wear resistance - Normalizing for uniform grain refinement and dimensional control - Optional stress-relief annealing to reduce internal stress and improve stability before final machining |
| Testing & Inspection | - Chemical: Alloy composition verified via spectrometer - Mechanical: Tensile, yield, hardness, and Charpy impact tests (longitudinal & transverse) - Ultrasonic Testing (UT): 100% volumetric inspection for internal integrity - Dimensional: Bore alignment, wall thickness uniformity, flatness, and surface roughness checks |
| Value-Added Services | - Pre-machining of center bore, seal grooves, mounting flanges, and bolt patterns - Full material traceability: heat number, batch number, and complete test reports (MTC, UT, mechanical) |
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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