18CrNiMo, 42CrMo,42CrNiMo Feer Forging Steel Round Bar In 100-7000kg Weight Range. Our Free Forging Steel Round Bars are high-performance industrial components crafted from premium alloy steels, including 18CrNiMo, 42CrMo, and 42CrNiMo. Produced through the free forging process, these bars boast superior internal integrity, refined grain structure, and enhanced mechanical properties compared to conventional rolled or cast materials. Ranging from 100kg to 7000kg, they are engineered to meet the stringent demands of heavy-duty applications, serving as robust raw material for shafts, spindles, large bolts, and other critical structural and mechanical components.
Key Features
- Premium Alloy Steel Grades:
- 18CrNiMo: High strength, excellent toughness, and superb case-hardening capabilities for highly stressed parts.
- 42CrMo: Balanced strength, hardness, wear resistance, and good machinability; a versatile workhorse.
- 42CrNiMo: Enhanced strength, toughness, and through-hardenability, especially beneficial for larger sections.
- Superior Free Forging Process: Creates optimal grain flow, eliminates internal defects (like porosity), and significantly boosts fatigue life and overall mechanical performance.
- Wide Weight Range: Capable of producing heavy-duty round bars from 100 kg to 7000 kg, suitable for large-scale industrial projects.
- Homogeneous Structure: Ensures consistent material properties throughout the entire bar, crucial for critical applications.
- Excellent Machinability: Despite high strength, these grades offer good machinability for further processing into final components.
Application Areas
These heavy-duty free forged round bars are essential in industries requiring robust and reliable components:
- Heavy Machinery: Large shafts, axles, pins, and structural components for excavators, cranes, and mining equipment.
- Power Generation: Turbine and generator shafts, rotor components, and other heavy-duty rotating parts.
- Oil & Gas Industry: Drill collars, valve components, pump shafts, and downhole tools.
- Shipbuilding: Propeller shafts, rudder stocks, and other marine power transmission components.
- Gear Manufacturing: Blanks for large industrial gears and pinions.
- Machine Tools: Heavy-duty spindles, arbors, and lead screws.
- Custom Forgings: Ideal for bespoke large-scale industrial components requiring high strength and durability.
| Item |
Details |
| Product Name |
18CrNiMo, 42CrMo,42CrNiMo Feer Forging Steel Round Bar In 100-7000kg Weight Range |
| Material Grades |
- Medium/high-carbon steels engineered for structural strength
- Customized compositions for heavy-load applications |
| Forging Equipment |
- Hydraulic Presses: 5T, 8T, 12T
- Capable of producing large-diameter shaft forgings with directional grain flow |
| Manufacturing Process |
Raw Material Inspection → Preheating → Open Die Forging → Heat Treatment → Rough Machining → Non-Destructive Testing → Final Machining (if required) → Dimensional Inspection → Packaging |
| Forging Ratio |
≥ 3.0 — Ensures enhanced internal density and fatigue resistance for high-stress applications |
| Applications |
- Crusher drive shafts & main shafts
- Crane boom pivot shafts
- Heavy conveyor head/tail shafts
- Hydraulic press spindles
- Compressor crankshafts |
| Delivery Conditions |
- Delivered in heat-treated condition
- Optional: As-forged, stress-relieved, or semi-machined states per requirements |
| Testing & Inspection |
- Chemical Analysis (Optical Spectrometry)
- Mechanical Testing: Tensile, Hardness
- Non-Destructive Testing: Ultrasonic Testing (UT), Magnetic Particle Testing (MT)
- Dimensional inspection |
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.
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