Products Description
Inconel 690 (UNS N06690) is a high-chromium nickel-based alloy developed as an advanced modification of Inconel 600. With a minimum nickel content of 58% and chromium content of 27–31%, it delivers exceptional resistance to high-temperature oxidation, stress-corrosion cracking, and aggressive chemical environments.
Jiangsu Cunrui Metal Products Co., Ltd. supplies Inconel 690 seamless pipe manufactured to international standards including ASTM B167, ASME SB167, and AMS specifications. Our products serve critical applications in nuclear power generation, chemical processing, and petrochemical industries worldwide.
Key Features & Advantages
| Feature | Benefit |
| High Chromium Content (27–31%) | Superior resistance to oxidizing chemicals and high-temperature oxidizing gases |
| High Nickel Content (≥58%) | Excellent resistance to stress-corrosion cracking in chloride-containing environments and sodium hydroxide solutions |
| Outstanding Oxidation Resistance |
Maintains stability at temperatures up to 1000°C (1832°F) |
| Low Corrosion Rates | Negligible material release in high-velocity water at elevated temperatures; resists intergranular attack in caustic solutions |
| Excellent Fabricability | Good metallurgical stability, high strength, and favorable forming characteristics |
Chemical Composition (ASTM B167 / UNS N06690)
|
Source: ASTM B167 / ASME SB167 standard specifications Mechanical Properties (Annealed Condition)
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Available Specifications & Dimensions
| Parameter | Range |
|---|---|
| Standards | ASTM B167, ASME SB167, ASTM B829, ASME SB829 |
| Outer Diameter | 10 mm – 530 mm (custom available) |
| Wall Thickness | 0.5 mm – 60 mm |
| Length | Up to 50 meters continuous, or cut-to-length |
| Surface Finish | Bright annealed, polished, pickled, or as-rolled |
Key Applications
Nuclear Power Industry: Steam generator tubing, reactor components, heat exchangers, and nuclear fuel reprocessing equipment
Chemical & Petrochemical Processing: Furnaces, burners, ducts, and equipment handling nitric/hydrofluoric acid solutions
Waste Treatment: Radioactive waste vitrification equipment, incinerators, and coal gasification units
Our Company & Facility
Jiangsu Cunrui Metal Products Co., Ltd. operates a modern manufacturing facility equipped with advanced production lines and rigorous quality control systems-4-9. We specialize in nickel-based alloys, stainless steels, and special metal products for demanding industrial applications.
01
Factory-Direct Pricing
Competitive quotations with volume-based discounts
02
Quality Assurance
Every batch ships with full Mill Test Certificates (MTC), chemical composition reports, and optional third-party inspection reports
03
Certifications
ISO 9001 certified, compliant with ASTM, ASME, and international standards
04
Third-Party Support
We accommodate third-party inspections, and can assist with tariff-neutral shipping arrangements upon request
Packaging & Logistics
We understand the importance of safe delivery. Our packaging solutions include:
- Wooden crates, iron frames, or bundling with end protectors
- Customized packaging per customer specifications
- Standard export seaworthy packing
- Flexible shipping options: FOB, CIF, CNF, and door-to-door logistics
Quality Certifications & Trust
At Jiangsu Cunrui Metal Products Co., Ltd., quality is not just a promise-it is a documented process. Our Inconel 690 seamless pipes are manufactured under strict quality management systems, with full traceability from melt to finished product. Each shipment is accompanied by EN 10204 Type 3.1 or Type 3.2 mill test certificates, PMI (Positive Material Identification) reports, and dimensional inspection records. We also support third-party inspections from recognized bodies such as SGS, BV, and TUV upon request. Our ISO 9001 certification and compliance with ASTM, ASME, and API standards reflect our commitment to delivering materials that meet the most demanding project specifications. This transparency gives our customers confidence not only in our products but also in our people and processes.
Long-Term Partnerships
We believe that trust is built order by order. Many of our clients return to us after their first purchase-not just because of product quality, but because we listen, respond, and deliver consistently. Whether it is adjusting delivery schedules to meet tight project deadlines, offering technical advice on material selection, or providing after-sales support, we treat every order as the beginning of a long-term relationship. Our reputation in the industry is reflected in our repeat business and the referrals we receive from satisfied customers across Europe, the Americas, the Middle East, and Southeast Asia.
FAQ
Q: What standards do your Inconel 690 seamless pipes comply with?
A: We manufacture to ASTM B167, ASME SB167, and AMS standards. Full test reports and mill certificates are provided with each shipment.
Q: Can you supply custom sizes outside standard ranges?
A: Yes. We support custom outer diameters (up to 530 mm), wall thicknesses, and lengths. Tell us your requirements and we will confirm feasibility.
Q: Do you offer third-party inspection services?
A: Yes. We accommodate third-party inspections (BV, TUV, SGS, etc.) upon request. Reports can be issued in English with full traceability to heat numbers.
Q: What is your typical lead time for Inconel 690 seamless pipes?
A: For standard sizes in stock, shipment is available within 7–15 days. Custom orders typically require 4–6 weeks depending on specifications and quantity.
Q: Can you provide PMI test reports?
A: Yes. Positive Material Identification (PMI) testing is available upon request, confirming the material chemistry matches the specified grade.
Q: What is the difference between Inconel 690 and Inconel 600?
A: Inconel 690 has significantly higher chromium content (27–31% vs. 14–17%), providing superior resistance to stress-corrosion cracking and oxidation in high-temperature aqueous environments, particularly in nuclear steam generator applications.
