Products Features
Outstanding Resistance To Stress Corrosion Cracking
Its high chromium content (approximately 30%) gives it excellent resistance to stress corrosion cracking in high-temperature pure water, chloride-containing solutions, and alkaline solutions, making it particularly suitable for critical components such as heat transfer tubes in nuclear power plant steam generators.
Excellent High-temperature Corrosion Resistance
Exhibits stability in high-temperature oxidative media (such as nitric acid, high-temperature water vapor) with excellent oxidation resistance, carburization resistance, and nitrogen penetration resistance.
Good Organizational Stability
Maintain good microstructural stability during long-term service at high temperatures, with uniform carbide distribution at grain boundaries, excellent sensitization resistance, and ensure good corrosion resistance is retained after welding and thermal processing.
Good Machining and Welding Properties
It exhibits excellent cold and hot working properties as well as welding performance, enabling it to be processed into various forms such as plates, strips, bars, wires, and tubes to meet the requirements of different industrial applications.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Ni |
≥ 58.0% |
Matrix element |
|
Cr |
27.0 - 31.0% |
Provide antioxidant, anti-corrosion, and stress corrosion resistance capabilities |
|
Fe |
7.0 - 11.0% |
Structural support, improved processing performance |
|
C |
≤ 0.05% |
Strict control to enhance desensitization capability |
|
Si |
≤ 0.50% |
Strict control to improve hot working performance |
|
Mn |
≤ 0.50% |
Deoxidizer, improve hot working properties |
|
P |
≤ 0.020% |
Strict control to prevent hot brittleness |
|
S |
≤ 0.015% |
Strict control to prevent hot brittleness |
|
Cu |
≤ 0.50% |
Strict control |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.19 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1343 - 1377 °C |
- |
|
Specific Heat Capacity |
450 J/kg·K |
20 °C |
Mechanical Properties (Solution Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 620 MPa |
ASTM B168 / B166 |
|
Yield Strength |
≥ 240 MPa |
ASTM B168 / B166 |
|
Elongation |
≥ 30% |
ASTM B168 / B166 |
|
Hardness |
≤ 100 HRB (or ≤ 220 HB) |
- |
High-temperature Performance
At 700 °C, the tensile strength typically exceeds 400 MPa.
Long-term Temperature Range: For high-temperature corrosion applications, the recommended long-term operating temperature range is -200°C to 700°C.
Maximum Intermittent Temperature Resistance: Up to 1000°C.
Corrosion Resistance: Exhibits excellent resistance to stress corrosion cracking in high-temperature and high-pressure water, oxygen-containing environments, and acidic media. The high chromium content provides good oxidation and carburization resistance in high-temperature oxidizing atmospheres.
Sensitization Resistance: Optimized carbon content and stabilization treatment ensure the material maintains good resistance to intergranular corrosion after welding and thermal processing.
Application Fields
-
Nuclear power steam generator heat transfer tubes
-
Chemical processing equipment (reactors, heat exchangers, nitric acid concentrators)
-
High-temperature corrosion-resistant structural components
-
Heat treatment furnace parts
-
Wastewater treatment equipment
-
Nitric acid production and storage equipment
-
High-temperature fasteners and hardware
-
Petrochemical high-temperature corrosion environments
-
Heat exchangers
-
Glass manufacturing and high-temperature furnace components
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive Inconel 690 materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Seamless Pipe
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
|
Customization Capability |
Special thick/thin rolling, ultra-wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars, and various heat treatment conditions |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatments (stabilization treatment, grain size control), acid-washed surfaces, electrolytic polishing, coatings, or special protective films |
Special surface treatment, precision drawing |
Why Choose Us as Your Supplier? - Reliable Engineering Technology. Dependable Delivery.
We are more than just a supplier; we are your trusted material partner in China.
Vertical Integration in Production
With 20,000 square meters of owned facilities and over 10 automated production lines (annual capacity of over 8,000 tons). An internal mold center supports rapid customization and effective cost control, with no markup from middlemen.
Strict Quality Control is Implemented at Each Stage
Full traceability throughout the production process for all key quality control checkpoints. 100% compliance with ASTM/ASME, EN, and GB standards. Each batch of goods is accompanied by a material test report.
Reliable Delivery and Export Packaging
With over 10 years of experience exporting to Europe, North America, Southeast Asia, and the Middle East, the products are equipped with waterproof and rustproof protection. Combined with flexible shipping options, this ensures safe and timely delivery of goods.
Prenatal Sample Verification
We provide free samples for quality confirmation, and you can only place bulk orders after obtaining approval. We ensure consistency from sample to mass production through precise dimensional measurements and transparent manufacturing processes.
FAQ
Q: What are the main advantages of Inconel 690?
Q: What kind of heat treatment does Inconel 690 require?
Q: What is the maximum operating temperature?
Q: What is the difference from Inconel 600?
Hot Tags: inconel 690, China inconel 690 manufacturers, suppliers, factory
