About Our Custom Forging Parts & Full-Cycle Manufacturing
Established in , Jiangsu Liangyi Co., Limited is a top professional manufacturer of open die forging parts, custom forged steel parts and seamless rolled rings located in Jiangyin City, Jiangsu Province, China. Our factory covers 80,000㎡ with fixed assets up to 40 million USD and an annual capacity of 120,000 tons.
As a global supplier, we provide the full service from steel melting, forging, heat treatment to fine machining, fully according to your drawings and specs. We make forged parts weighing from 30KGS to 30,000KGS single-piece with a 6000-ton forging press. Our products are exported to more than 50 countries, including Germany, USA, Australia, Saudi Arabia, UAE, South Korea, Japan, Brazil and South Africa.
Please review the detailed information about our main forged products on our Products page, or view our advanced manufacturing equipment on our Equipment page.
For sourcing teams, EPC contractors, OEM buyers, and maintenance departments, the value of custom forging parts is not limited to dimensional customization. It also includes control of grain flow, internal soundness, mechanical performance, heat treatment condition, traceability, and machining allowance according to the final service environment.
- Heavy section forgings
- Drawing-based production
- Certified materials
- Third-party inspection
- Export documentation
Full Range of Custom Forging Parts Shapes & Specs
We manufacture a full range of custom forging parts in all shapes and dimensions, which meet international standards. Following are our product range:
- Shaft Forgings: Round/flat/square bars, step shafts, gear shafts, crankshafts, eccentric shafts, turbine shafts, rotor shafts and spindles (max length 15m, max diameter 1800mm, max weight 30 tons)
- Seamless Rolled Rings: Gear rings, slewing bearing rings, contoured rings, flanges and custom rings (max outer diameter 6m, max weight 30 tons)
- Valve & Pump Forgings: Valve bodies, stems, closures, bonnets, seats, pump fluid ends, nozzles and tubing/casing hangers for oil & gas
- General Industrial Forgings: Sleeves, bushings, tubes, cylinders, discs, covers, tube sheets, cases, shells, rolls, wheels, hubs, blocks, pistons, gears, pinions, couplings
- Power & Energy Forgings: Turbine blade steel, wicket gates, guide vanes, hydro/wind/thermal power parts
Key Advantages of Our Open-Die Forging Parts
Our open die forging parts have great performance for extreme working conditions .Following are their main advantages:
- Full Customization: Different geometries and special specs based on clients drawings, not available by casting or standard machining
- Cost-Effective: Reduced material waste compared to full machining, helping clients cut production costs
- Superior Metallurgy: Refined, consistent grain distribution with improved metal flow lines, eliminating internal defects
- Enhanced Performance: Improved strength, toughness, fatigue resistance, ductility, and impact resistance for heavy load/high pressure/extreme environments
- Full Traceability: In-house production from steel melting to final inspection, with complete testing reports for every batch
Global Industrial Applications & Geo-Targeted Project Cases
Our forged parts are used in important industries, with proven references based on each region's standards and needs. We have many experience in producing parts to meet ASTM International, DIN, API, and other global standards.
Main Global Industrial Applications
- Power generation: Hydro, wind, tidal, thermal and nuclear auxiliary equipment
- Natural resources: Open-pit/underground mining, mineral processing, cement mill, metallurgy and steel mill
- Oil & gas: Onshore/offshore oilfield, wellhead equipment, petrochemical processing and refineries
- Marine & offshore: Shipbuilding, offshore platforms, marine engineering and propeller systems
- General industry: Pressure vessel, heat exchanger, rail vehicles, lifting equipment, automotive, defense, paper machinery, sugar mill and tyre making machinery
Proven Geo-Targeted Project Cases
European Union Market
Forged parts for wind power main shafts, hydro power turbine components, and aerospace precision forgings for clients in Germany, France, Italy, and Spain, with full EN 10204 3.1/3.2 MTC. They all meet DIN EN and PED .View more on our Reference page.
North American Market
Forged steel parts manufactured to ASTM/ASME and API 6A requirements for oilfield wellhead equipment in the USA and Canada, including valve bodies, tubing hangers, and pump fluid ends. View more on our Reference page.
Middle East Market
High-temperature and corrosion-resistant alloy forging parts for large-scale oil and gas projects in Saudi Arabia, UAE, and Iran, including pipeline parts and pressure vessel forgings. View more on our Reference page.
Oceania Market
Heavy-duty wear-resistant forged parts for large open-pit mining operations and cement plants in Australia and New Zealand, including mill rolls, crusher shafts, and gear blanks. View more on our Reference page.
East & Southeast Asia Market
Forged steel parts for shipbuilding, thermal power plants, and petrochemical projects in Japan, South Korea, Vietnam, and Thailand, including marine propeller shafts and turbine rotors. They all meet JIS and KS standard. View more on our Reference page.
South American & African Market
Cost-effective high-quality custom forging parts for mining, hydro power, and sugar mill projects in Brazil, Chile, South Africa, and Egypt, with full technical support and localized logistics. View more on our Reference page.
Complete In-House Heat Treatment & Quality Testing
To make sure every batch of forged parts have high quality , we have full in-house heat treatment and advanced testing facilities, with all processes in line with international standards. We provide full testing reports and material certification for every product.
Custom Heat Treatment Services
With ten computer-controlled heat treatment furnaces, we provide custom solutions as per your requirements and material grades, including: water/oil quenching, normalizing, soft annealing, stress relief annealing, austenitizing, tempering, solution treatment and ageing treatment.
Non-Destructive Testing (NDT)
All our forging parts pass NDT, with testing performed in accordance with DIN EN ISO 9712 methodology, and all important products are tested with UT testing . Our NDT capabilities include Ultrasound Testing (UT), Dye Penetrant Inspection (PT), Magnetic Particle Testing (MT), Visual Inspection (VT), Radioactivity Measurement, and Residual Magnetism Measurement.
Destructive Testing & Material Analysis
We provide full testing with advanced in-house lab equipment:
- Mechanical Testing: Room-temperature tensile test, warm tensile test up to 1000°C, notch impact test from -196°C, compression test, hardness test (Brinell, Rockwell, Vickers) and creep test
- Metallographic Analysis: Microstructure examination, grain size determination, melting test, purity level analysis, intermetallic phase analysis, Huey-Test, corrosion tests (G28, G48, IK)and segregation testing
- Chemical Analysis: Advanced optic emission spectrometer and X-ray fluorescence spectrometer for chemical element analysis
Full Range of Material Grades for Forged Steel Parts
We manufacture custom forging parts in a wide range of steel and alloy grades, manufactured to ASTM, AMS, AISI, API 6A, DIN, EN, JIS and other standards. Full EN 10204 3.1/3.2 MTC is available.
Review detailed material specifications on our Materials page. Following are our main material range:
Carbon Steel Forgings
AISI 1018, 1045, 1050; ASTM A105, ASME SA350 LF1/LF2/LF3/LF6, A707, ASTM A694 F42/F50/F52/F60/F65/F70; C45 (1.0503), S355J2 (1.0570) and St52-3. View more: Carbon Steel
Alloy Steel Forgings
AISI 4130, 4140, 4330, 4330V mod, 4340, 8620, 8630, 9310, 9840; 42CrMo4 (1.7225), 25CrMo4, 34CrNiMo6 (1.6582), 17CrNiMo6, 34CrMo4, 30CrNiMo8, 18CrNiMo7-6, 16MnCr5 and 41Cr4. View more: Alloy Steel
Chrome Moly Steel Forgings
ASTM A182-F1, F5, F5A, F9, F11, F12, F22, F22V, F91, F92; 12CrMo9-10 and13CrMo4-5. View more: Chrome Moly Steel
Stainless Steel Forgings
Austenitic: 304/L/H, 316/L/H, 310S, 321/H, 347/H; Martensitic & PH: 410, 420, 440C, 17-4PH (AISI 630), 15-5PH and 17-7PH; Duplex & Super Duplex: 2205, 2507, Zeron 100, F51, F53 and F55; Super Austenitic: 904L, 254SMO, 654SMO, A286 and Alloy 20. View more: Stainless Steel
Nickel & Super Alloys
Nickel 200/201; Monel 400, Monel K-500; Hastelloy C-276, C-22, B-2, X; Inconel 600, 601, 625, 718, X-750; Incoloy 800/800H/800HT, 825, 925; Nimonic 75, 80A, 90; Maraging Steel C300/C350. View more: Nickel & Super Alloys
Tool & Die Steel Forgings
Hot Work Steel: H11, H13, SKD61; Cold Work Steel: D2, A2, S7, O1, SKD11, DC53; Plastic Mould Steel: P20, P20+Ni, NAK80, S136; Full range of DIN/JIS standard tool steel grades. View more: Tool & Die Steel
All third-party trade names and registered trademarks (including Hastelloy®, Inconel®, Incoloy®, Monel®, Nimonic®, Zeron® 100, and others) referenced on this page are the property of their respective owners and are used for material identification purposes only. Jiangsu Liangyi Co., Limited is not affiliated with or endorsed by the trademark owners.
Our Custom Forging Parts Manufacturing Process
We have improved our process for more than 25 years to make sure we can keep efficient production, on-time delivery, and consistent quality. Following are our full custom process:
This process helps buyers from other countries understand the information about checking the materials, controlling the forging ratio, keeping records of heat treatment, checking the dimensions, reviewing the NDT, making the final documentation, and packing for export.
Frequently Asked Questions About Our Forging Parts
The usual lead time is 20-35 working days for raw material procurement, forging, heat treatment and inspection. For urgent orders, we can provide expedited production with a lead time of 10-15 working days, subject to material availability. For orders with complicated machining, the lead time will be evaluated based on clients drawing.
Our forged parts are manufactured to all major international standards, including ASTM, ASME, AISI, DIN, EN, JIS, API 6A, PED 2014/68/EU and ISO standards. We can also produce products according to clients specifications.
Yes, we provide EN 10204 3.1 MTC for all orders, and we can also provide EN 10204 3.2 certificate with third-party inspection by authorized institutions such as TÜV, SGS, BV, etc., according to clients requirements.
We can produce forged parts with a single-piece weight ranging from 30KGS to 30,000KGS (30 tons). For shaft forgings, the maximum length is 15 meters and maximum diameter is 1800mm. For seamless rolled rings, the maximum outer diameter is 6 meters.
Yes, we provide full machining services from rough machining, semi-finish machining to finish machining, according to clients drawing and requirements. Our in-house CNC machining equipment can hold tight tolerances, providing you with ready-to-use finished parts.
We export our forged parts to more than 50 countries and regions around the world, including Germany, USA, UK, France, Italy, Spain, Australia, New Zealand, Saudi Arabia, UAE, South Korea, Japan, Brazil, Chile, South Africa, and many other countries. We have extensive experience in export logistics and customs clearance.
In order to get the most accurate quotation, please send your drawing or sample, material grade, forging dimensions, single-piece weight, quantity, machining requirement, heat treatment condition, required tests, and destination country. If some details are still not available, our engineering team can also provide professional suggestions based on the service condition.
Yes. We can cooperate with the third-party inspection bodies such as TÜV, SGS, BV, and other customer-designated agencies for witness points, dimensional verification, NDT review, and document confirmation before shipment.
Get Your Custom Forging Parts Quotation Today
As a professional China forging manufacturer with more than 25 years of experience, we can provide clients with the highest quality products, competitive prices, and professional technical support. Whether you need standard forged parts or fully custom special forgings, we can provide professional suggestions for your project.
Please send us your detailed drawing, material grade, quantity, and technical requirements, and our sales team will get back to you with a detailed quote and technical suggestions within 24 working hours.
Contact Us For Custom Forging Solutions
Inquiry Email: sales@jnmtforgedparts.com
Phone/WhatsApp: +86-13585067993
Website: https://www.jnmtforgedparts.com
Address: Chengchang Industry Park, Jiangyin City, Jiangsu Province, China
Welcome to visit our factory and contact us for more information!
What to send for a faster and more accurate quote
- 2D/3D drawing, sketch, or sample photo
- Material grade or applicable standard
- Single-piece weight, finished dimensions, and quantity
- Heat treatment condition, NDT scope, and certification level
- Machining allowance, tolerance, surface requirement, and destination country
Typical engineering response time: within 24 working hours after receiving complete RFQ information.
Factory visits and third-party inspections: Available by appointment before shipment.