Custom Inconel 690 Forgings | Alloy 690 | UNS N06690 | China Professional Forging Manufacturer
Public reference price: USD 20 per kg. Final quotation may vary depending on forging size, drawing complexity, testing requirements, heat treatment, machining scope, order quantity, and delivery terms.
Product Overview
Established in , Jiangsu Liangyi is a professional ISO 9001:2015 certified manufacturer in China. Our main products are custom open die forging parts and seamless rolled rings made from Inconel 690 (also known as Alloy 690, UNS N06690). This high-chromium nickel alloy has good resistance to corrosive aqueous media and bad high-temperature environments, great fabrication characteristics, good metallurgical stability, and high mechanical strength.
Our factory covers an area of 80,000 m² with an annual manufacturing capacity of 120,000 tons. Our workshop is equipped with the most advanced forging & inspection equipment. We have shipped precision-forged Inconel 690 parts to clients across nuclear power, petrochemical, energy, and industrial fluid control industries in more than 50 countries. We can produce forged steel parts from 30 kg to 30,000 kg. We could supply forged material from steel melting, forging, heat treatment to machining according to clients’ drawings and technical manuals.
Need custom Inconel 690 forgings for your project? Get a free quote within 24 hours.
Get a Custom QuoteWhy Choose Jiangsu Liangyi for Inconel 690 Forgings?
There are hundreds of global competitors in nickel alloy forgings; the following are Jiangsu Liangyi’s advantages:
Own VIM+VAR Vacuum Melting Furnaces
Unlike most other Chinese forging mills that outsource melting, we have our own VIM+VAR furnaces in house, so we can control better the purity, traceability and nuclear-grade quality of the material.
ASME Section III Nuclear Certificated
One of the very few China forging manufacturers with ASME Section III Nuclear N-Certificate qualification, we can directly supply to global nuclear power projects without third-party sub-contracting.
40+ Nuclear Plant Project References
We have traceable records with Inconel 690 forgings parts installed in 40+ nuclear power plants across Asia, Europe and the Middle East. The full set of MTC 3.2 traceable document will be provided for every project.
Double Standards Accordance: ASME + PED
Our Inconel 690 forgings materials are simultaneously qualified by American ASME/ASTM standards and European PED 2014/68/EU, thus we are the best single-source supplier for many engineering projects.
120,000 Ton Annual Production Capacity
Our factory covers an area of 80,000 m² and has an annual capacity of 120,000 tons, so we can deliver on time without subcontracting to third parties even for large-scale nuclear energy or petrochemical project orders.
One-Stop Service: From Melting to Machined Part
From raw material sourcing, vacuum melting, forging, heat treatment to precision CNC machining and NDT testing — all are finished in-house, thereby eliminating supply chain risk.
Inconel 690 (Alloy 690 / UNS N06690) Forged Products
We produce different shapes of Inconel 690 forging parts in strict accordance with international standards and client drawings, covering all types of open die forgings and seamless rolled rings:
Forged Bars & Shafts
We supply high-quality Inconel 690 forged round bars, square bars, flat bars, rectangular bars, and custom-shaped rods & shafts. They are strictly machined as per size tolerances.
Seamless Rolled Rings & Hollow Parts
The Alloy 690 seamless rolled rings, forged hubs, housings, shells, sleeves, bushings, and hollow bars we produce are ideal materials for high-pressure valves, pumps, and reactors. The material matching is good and the metallographic structure is uniform.
Forged Discs, Plates & Blocks
We produce precision UNS N06690 forged discs, blocks, and plates which are suitable for turbine, pump, and pressure vessel parts. The thicknesses and sizes are customized to meet your project requirements.
Forged Pipes, Tubes & Piping Parts
The Inconel 690 forged pipes, seamless tubes, piping shells, casings, tube sheets, baffle plates, nozzles, and channel flanges we made are widely used in boilers, heat exchangers, pressure vessels, and nuclear reactor systems. They have good corrosion and resistance to high-pressure.
Custom Forged Parts
We also supply custom Inconel 690 forged valve parts, pump parts, flanged bosses, transition cones, and other special-shaped forgings per your custom drawings and technical manuals.
Inconel 690 vs Inconel 625 vs Inconel 718 — Material Comparison
Choosing the right nickel alloy for your uses is important. The table below compares Inconel 690 (UNS N06690) with other commonly used nickel superalloys to help engineers and procurement teams make right decisions:
| Property / Factor | Inconel 690 (N06690) ⭐ | Inconel 625 (N06625) | Inconel 718 (N07718) | Incoloy 825 (N08825) |
|---|---|---|---|---|
| Ni Content | ≥58.0% | ≥58.0% | 50–55% | 38–46% |
| Cr Content | 27–31% (highest) | 20–23% | 17–21% | 19.5–23.5% |
| Tensile Strength | 724 MPa | 930 MPa | 1240 MPa | 586 MPa |
| Max Service Temp | 1093°C | 1093°C | 700°C | 540°C |
| Nuclear PWR Use | ⭐⭐⭐⭐⭐ Main Choice | ⭐⭐⭐ | ⭐⭐⭐⭐ Structural | ⭐⭐ |
| Corrosion Resistance | ⭐⭐⭐⭐⭐ PWSCC Immune | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ |
| Main Standards | ASTM B166, B564, ASME Sec.III | ASTM B446, B564 | AMS 5662, ASTM B637 | ASTM B424, B425 |
| Main Uses | Nuclear steam generators, petrochemical heat exchangers | Offshore, marine, aerospace | Aerospace turbines, high-strength fasteners | Chemical processing, oil & gas |
Conclusion: Inconel 690 is the best alloy for nuclear power uses due to its highest chromium content (27–31%), which provides immunity to PWSCC — the main failure mode in PWR steam generator tubing. For industries which require higher strength at elevated temperatures, Inconel 718 may be more suitable. Contact our engineers for suggestion on material choice for your specific use.
Main Industries & Global Project Case Studies
Our Inconel 690 forgings are widely used in critical applications that require good corrosion resistance and high-temperature performance. The following are some case studies:
Nuclear Power Plant Steam Generator Systems
Our Inconel 690 forged tubesheets, baffles, flow limiter venturi forgings, and steam generator divider plates are main parts installed in over 40 units of 1000MW+ pressurized water reactor (PWR) nuclear power plants across Asia, Europe, and the Middle East. Manufactured to strict nuclear-grade standards, these Alloy 690 parts offer good resistance to primary coolant corrosion and high-temperature oxidation, supporting a 60+ year service life for critical steam generator systems. We also make forged tubes for nuclear projects, such as turbocharger surge pipelines, reactor nozzles, and main pump flywheels.
Nuclear Reactor Coolant Pump (RCP) Systems
As a leading forging manufacturer in China, we supply precision UNS N06690 forged RCP casings, impellers, rotors, seal chamber parts, and bearing housings to more than 30 nuclear reactor units all over the world. We make our Inconel 690 RCP parts with double vacuum melting (VIM+VAR) way to meet the strict fatigue, impact resistance and size accuracy requirements for main loop reactor systems, with full accordance to ASTM and ASME Section III nuclear codes.
Petrochemical & Energy Heat Exchanger & Pressure Vessel Systems
Our Alloy 690 forged pipe tubes, channel flanges, baffle plates, pressure vessel nozzles, and transition cones are main parts for the world's top petrochemical enterprises, used in high-temperature sour gas heat exchangers, hydrocracking units, and high-pressure process vessels. The 27–31% high chromium content of UNS N06690 makes it has good resistance to sulfide stress corrosion cracking (SSCC), oxidation, and bad aqueous media, reducing equipment maintenance downtime by over 40% compared with standard stainless steel parts.
Industrial Valve & Fluid Control Systems
We manufacture custom Inconel 690 forged balls, bonnets, bodies, stems, seat rings, cores, and discs for the main isolation and control valves in LNG terminals, offshore oil platforms and chemical plants. These Alloy 690 valve parts work stably in bad temperature ranges from −196°C to 650°C, with good resistance to hydrogen embrittlement and corrosive media, ensuring zero leakage in high-pressure fluid systems. Our valve forgings are suitable for ball valves, check valves, gate valves, and back pressure valves.
Gas Compressor & Industrial Turbine Systems
Our UNS N06690 forged flat rectangular bars and turbine blades are mainly used in gas compressor and industrial turbine systems for power generation and petrochemical industries.Thanks to Inconel 690’s high-temperature strength and resistance to oxidation, the forging parts can work well for a long time even in continuous high-speed rotating equipment, this can reduce the frequency of parts replacement and lower the costs for clients.
Looking for a suitable manufacturer for your nuclear grade Inconel 690 project? Contact our engineering team today.
Contact Our TeamInconel 690 (Alloy 690 / UNS N06690) Material Specifications
Chemical Composition
The chemical composition of our forged Inconel 690 rings and parts strictly meet international standards, the main elements are as following:
| Element | Content Range |
|---|---|
| Nickel (Ni) | 58.0% minimum |
| Chromium (Cr) | 27.0% – 31.0% |
| Iron (Fe) | 7.0% – 11.0% |
| Carbon (C) | 0.05% maximum |
| Silicon (Si) | 0.50% maximum |
| Manganese (Mn) | 0.50% maximum |
| Sulfur (S) | 0.015% maximum |
| Copper (Cu) | 0.50% maximum |
Standard Melting Method
We use industry-leading melting method to get the purity and uniformity of our Alloy 690 forgings.There are two standard production routes, including high-quality nuclear-grade double vacuum melting:
-
Standard Commercial Production Route
- Step 1: Basic Electric Furnace (EF) Melting
- Step 2: Argon Oxygen Decarburization (AOD) / Vacuum Oxygen Decarburization (VOD) / Vacuum Degassing
- Step 3: Electroslag Remelting (ESR) / Electroflux Remelting (EFR) / Vacuum Arc Remelting (VAR)
- Optional Step 4: Secondary Vacuum Arc Remelting (VAR)
-
High-Quality Nuclear Grade Production Route (VIM+VAR)
- Step 1: Vacuum Induction Melting (VIM)
- Step 2: Electroslag Remelting (ESR) / Electroflux Remelting (EFR) / Vacuum Arc Remelting (VAR)
- Optional Step 3: Secondary Vacuum Arc Remelting (VAR)
Mechanical Properties (Delivery Condition)
All our UNS N06690 forgings are tested and certified to meet the following mechanical properties, with testing made in accordance with ASTM A370, ASTM E8, or ISO 6892-1 international standards:
| Property | Metric Value | Imperial Value |
|---|---|---|
| Tensile Strength | 724 MPa | 105,000 psi |
| Yield Strength (0.2% Offset) | 348 MPa | 50,500 psi |
| Modulus of Elasticity | 211 GPa | 30,600 ksi |
| Shear Modulus | 81.8 GPa | 11,900 ksi |
| Poisson's Ratio | 0.289 | 0.289 |
| Elongation at Break | 41% | 41% |
Hardness testing is made in accordance with ISO 6506-1 / ASTM E10 (Brinell), ISO 6508-1 / ASTM E18 (Rockwell), or ISO 6507-1 / ASTM E384 (Vickers). CVN impact testing accordance with ASTM E23 or equivalent international standard.
Inspection & Quality
We make strict inspection on every Inconel 690 forging we produce to make sure they are 100% accordance with international standards and customers’ requirement. Our main inspection standards include:
- Mechanical Testing: ASTM A370, ASTM E8, ISO 6892-1
- Hardness Testing: ISO 6506-1, ISO 6508-1, ISO 6507-1, ASTM E10, ASTM E18, ASTM E384
- Impact Testing: ASTM E23
- Chemical Analysis: ASTM A751, ASTM E415, ASTM E1086
- NDT: ASTM A388/A388M, ASTM E2375, ASTM E127, ASTM E428
- Surface Examination: INSP/MSC/10
- Heat Treatment Qualification: HTQR/MSC/01
We make complete traceable records for every stage of the manufacturing for each forging and we will keep the records for a minimum of 10 years upon customers’ request.
Test Document
For every shipment of Alloy 690 forgings, we provide 3 copies of certificated mill test report (MTC 3.1/3.2), which includes the following traceable information:
- Purchase Agreement Number, PDS Specification & Revision Number, Drawing & Item Number
- Total parts per shipment, Heat Number, Raw Material Source & Full Manufacturing Details
- Heat Treatment Temperature & Holding Time Charts
- Chemical Composition for each Heat and individual Forging
- Tensile Properties, Hardness Test Results, and Creep Rupture Test Data for each Forging
- Macro Etch & Microstructure Examination Results (with photographs)
- NDT Results, Forging & Test Identification Numbers
- NCR Number, Manufacturer Name, and statement of accordance with all specification
- Written approval document for any approved difference from the purchase
About Our Technical Team & Manufacturing Expertise
Checked & authored by Jiangsu Liangyi Engineering Team — Our technical manual is developed and checked by our senior metallurgical engineers and quality assurance experts with 20+ years of experience in nickel alloy forging. Jiangsu Liangyi Co., Limited has provided Inconel 690 forgings to nuclear power plants, petrochemical plants and offshore energy projects plant in over 50 countries since . All product specifications, chemical composition and mechanical properties listed on this page are according to ASTM, ASME, and ISO standards.
Frequently Asked Questions (FAQ) about Inconel 690 Forgings
Our Inconel 690 forgings meet international standards like ASTM B166, ASTM B564, ASME Section III (Nuclear Grade), DIN, EN, and JIS. They can also meet custom’s other requirements if need.
The lead time is 3–4 weeks for normal grade Inconel 690 forgings and 6–8 weeks for nuclear grade parts with double vacuum melting. We can also arrange the production in advance for urgent orders, please contact our team for details.
Yes, we make nuclear grade Inconel 690 forgings accordance with ASME Section III nuclear codes. We provide full set of traceability document, including MTC 3.2 certified reports, NDT test results, microstructure examination reports, and full melting records for nuclear projects.
The max weight we can make for Inconel 690 forging is 30,000 kg per piece. The biggest outer diameter for seamless rolled rings is up to 5000. All custom sizes can be manufactured per your drawings and requirement.
Yes, we provide one-stop service from steel melting, forging, heat treatment, to precision CNC machining. We can make finished Inconel 690 parts which are ready for installation, with strict size tolerance per your drawings.
We ship Inconel 690 forgings to over 50 countries, such as the United States, Germany, France, United Kingdom, Canada, Australia, UAE, Saudi Arabia, India, South Korea, Japan, Singapore, and Brazil. We will also provide a full set of documents with each shipment in accordance with local requirements, including MTC, packing list, commercial invoice and certificate of origin.
The chemical composition of Inconel 690 (UNS N06690) is: Nickel (Ni) 58.0% minimum, Chromium (Cr) 27.0–31.0%, Iron (Fe) 7.0–11.0%, Carbon (C) max 0.05%, Silicon (Si) max 0.50%, Manganese (Mn) max 0.50%, Sulfur (S) max 0.015%, Copper (Cu) max 0.50%. Thanks to the high content of chromium, the forging parts have good resistance to corrosionin in both aqueous and high-temperature environments.
Inquire About Custom Inconel 690 Forgings
As a professional Inconel 690 forging manufacturer with over 25 years of experience in China, we welcome your inquiries about custom Alloy 690 (UNS N06690) forged parts. Our engineering team will work closely with you to make sure to make the precision forgings meet your requirement and industry standards, with competitive prices and good delivery times.
Get a Free Quote Within 24 Hours✉️ Inquiry Email: [email protected]
📞 Phone / WhatsApp: +86-13585067993
🌐 Website: www.jnmtforgedparts.com
📍 Address:
Chengchang Industry Park, Jiangyin City, Jiangsu Province, 214400, China⏰ Working Hours: