Large Size Rolled Rings
- High-strength forging: Free-forged rings from 1–7000 kg provide excellent mechanical properties and fatigue resistance.
- Large-size capability: Standard outer diameter up to 3000 mm; larger sizes supported via certified subcontractors.
- Versatile materials: Carbon steel, alloy steel, and stainless steel grades selected to match load and environment requirements.
- Precision machining: More than 20 lathes plus CNC machining ensure accurate dimensions and consistent surface quality.
Technical Specifications
| Item | Specification |
| Product Name | Large Size Rolled Rings |
| Materials | Steel, carbon steel, alloy steel, stainless steel (other grades on request) |
| Outer Diameter Range | Up to 3000 mm standard; larger diameters available via subcontractors |
| Weight Range | 1–7000 kg free-forging ring parts |
| Process Route | Forging → Rough machining → Heat treatment → Final machining → Inspection |
| Forging Equipment | 5 t electro-hydraulic hammer ×1; 3 t electro-hydraulic hammer ×1; 1 t air hammer ×1; 750 kg air hammer ×2; 560 kg air hammer ×2 |
| Machining Equipment | More than 20 size lathes plus CNC machining, milling, turning, boring, drilling |
| Heat Treatment Options | Annealing, normalising, quenching & tempering, and Hardening |
| Nondestructive Testing | Magnetic particle test; Penetration test; Ultrasonic test; Radiographic test; others as required |
| Supply Capacity | 500–1000 tons/month |
| Delivery Time | 30–45 days (depending on size, quantity, and process route) |
| Packaging | Seaworthy plywood cases or pallets, or as per customer requirement |
| Main Markets | Europe, US, North America, Asia |
Applications
- Marine equipment and offshore structures
- Weapons and defense components
- Petrochemical industry vessels and flanges
- Mining machinery and large gear rings
- Nuclear power plant components
- Thermal power plant rotors and casings
- Hydropower turbine and generator rings
- Heavy industrial machinery and bearing housings
Manufacturing Capabilities
Forging Facilities
- 6300T / 3150T / 2000T free hydraulic presses.
- 5T, 3T, 2T, 1T, 750kg, 560kg electro-hydraulic hammers.
Heating Treatment Facilities
- RTX-9 series trolley furnaces in multiple sizes (5.5–8 m chamber length).
- RJ-9-850KW vertical furnace with 15 m depth.
- RTX-12-350KW high-temperature trolley furnace.
Machining Facilities
- CNC machines (max 32-ton load).
- Heavy-duty lathes and vertical mills (up to 70 tons).
- Gantry milling machines, deep-hole boring machines, grinding and turning centers.
Testing & Quality Control
- Spectrum analysis for chemical composition.
- Ultrasonic, non-destructive, and metallographic testing.
- Mechanical property test machines for yield, tensile, hardness.
Production Process
- Raw Material Selection: Use first-grade ingot steel, inspect chemical composition.
- Forging: Heat to precise temperature, perform open die or die forging.
- Heat Treatment: Quenching, tempering, or normalizing to meet mechanical targets.
- Machining: CNC turning, boring, milling, grinding, and drilling to precision ±0.01 mm.
- Inspection: Each shaft tested via 100% ultrasonic, hardness, and tensile checks.
- Packaging & Delivery: Anti-corrosion coating, safe transport packaging, global logistics support.
Additional Value-added Services
- Quench-and-temper heat treating
- Rough and finish turning
- Ultrasonic and mechanical testing
- Dimensional inspection reports
- Customized design and programming support
Quality Assurance
- Each forging carries a test bar for mechanical testing.
- 100% ultrasonic and visual inspection before shipment.
- Hardness, tensile, and metallographic verification.
- Compliance with ASTM, DIN, GB, and EN standards.
Why Choose Boberry
Integrated Production
Complete forging-to-machining production line ensures precision and fast delivery.
Advanced Equipment
Heavy-duty forging presses and CNC systems handle large, complex mechanical component geometries.
Certified Assurance
Certified production with ISO9001, PED, SGS compliance and global OEM support.
Logistics & Delivery
Lead Time: 15–30 days (urgent) / 30–45 days (normal).
Monthly Capacity: 500–1000 tons.
Packing: Wooden crates, steel frames, or per client request.
Shipment: By Sea (recommended, saves cost for forging parts) / By Air (fast but expensive).
Payment Terms: 30% deposit with balance via B/L copy; or 100% L/C at sight.
Delivery Terms: FOB, CIF, CNF.
Monthly Capacity: 500–1000 tons.
Packing: Wooden crates, steel frames, or per client request.
Shipment: By Sea (recommended, saves cost for forging parts) / By Air (fast but expensive).
Payment Terms: 30% deposit with balance via B/L copy; or 100% L/C at sight.
Delivery Terms: FOB, CIF, CNF.