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Model No: Inconel 690
Inconel 690
The Inconel 690 nickel alloy has outstanding resistance to many corrosive aqueous media and high temperature environments. High chromium content gives alloy 690 superior corrosion resistance to oxidizing acids (nitric acid in particular) and salts and to sulfidation at high temperatures.
Delivery :
FOB
minimum order :
100 kilograms
Supply Ability :
5000Tonkilograms / Month
Stock Time :
7-10Day
Country of Origin :
CHINA
Quantity :
Inconel 690 Description
The Inconel 690 nickel alloy has outstanding resistance to many corrosive aqueous media and high temperature environments. High chromium content gives alloy 690 superior corrosion resistance to oxidizing acids (nitric acid in particular) and salts and to sulfidation at high temperatures. The high chromium alloy also has excellent resistance to intergranular corrosion and intergranular stress corrosion cracking.
Excellent inoxidability in the high temperature.
Good resistance to carbonizing.
Good inoxidabilitiy in sulfur atmosphere
Good mechanical property in both room temperature and high temperature.
Good resistance to stress corrosion cracking, 690 have high creep rupture strength since it limits the carbon content and grain size, so recommend to use for above 500℃ environment.
Inconel 690 Applications
Inconel 690TM is supplied in commercial forms such as pipes and tubes. The superior stress cracking resistance means that Inconel 690 has superseded Inconel 600 and 601 in key industrial applications.
Inconel 690 is used in the following applications:
- Duct work
- Steam generators
- Furnaces
- Petrochemical heaters
- High-temperature burners
- Heat exchangers
High-temperature applications which are commonly exposed to caustic solutions
Metal pickling operations due to Inconel 690’s resistance to nitric acid and hydrofluoric acid mixtures.
One of the key industries that Inconel 690 has found widespread application in is the nuclear power industry due to the need for alloys which can withstand extremes of heat and other harmful environments. It is a commonly used alloy in nuclear reactor steam generators.
Specifications of Inconel 690 Nickel Alloy
| UNS | W. Nr |
| N06690 | 2.4642 |
Inconel 690 Chemical Compositions
| Element | Content (%) |
| Chromium, Cr | 27-31 |
| Iron, Fe | 7-11 |
| Silicon, Si | 0.5 max |
| Manganese, Mn | 0.5 max |
| Copper, Cu | 0.5 max |
| Silicon, Si | 0.5 max |
| Carbon, C | 0.05 max |
| Sulfur, S | 0.015 max |
| Nickel, Ni | Remainder |
Inconel 690 Physical Properties
| Properties | Metric | Imperial |
| Density | 8.19 g/cm³ | 0.296 lb/in³ |
| Melting point | 1343-1377°C | 2450-2510°F |
Inconel 690 Mechanical Properties
| Properties | Metric | Imperial |
| Poisson's ratio | 0.29 | 0.29 |
| Hardness | 85 | 85 |
Inconel 690 Thermal Properties
| Properties | Metric | Imperial |
| Thermal conductivity | 12.1 W/mK | 84 BTU in/hr.ft².°F |
Other Designations
Other designations that are equivalent to Inconel 690 include:
ASTM B167
DIN 2.4642
Fabrication and Heat Treatment
Inconel 690 can be fabricated using a number of conventional processes. This section will provide an overview of fabrication and heat treatment methods that can be used to produce this material.
Machinability
Inconel 690 can be machined using conventional machining methods, which are used for iron-based alloys. Machining operations are performed using commercial coolants. High-speed operations, such as grinding, milling, or turning, are performed using water-base coolants.
Forming
Inconel 690 can be formed using all conventional techniques.
Welding
Inconel 690 is welded using gas-tungsten arc welding, shielded metal-arc welding, gas metal-arc welding, and submerged-arc welding methods.
Heat Treatment
Inconel 690 does not react to heat treatment.
Forging
Inconel 690 is forged at 1038 to 1233°C (1900 to 2250°F).
Hot Working
Inconel 690 is hot worked at 872 to 1205°C (1600 to 2200°F).
Cold Working
Inconel 690 is cold-worked using standard tooling.
Annealing
Inconel 690 is annealed at 1038°C (1900°F) followed by cooling.
Aging
Inconel 690 does not react to aging thermal treatment.
Hardening
Inconel 690 is hardened by cold working.
Lork Group is an supplier of industrial metals to the global aerospace, oil and gas, power generation, petrochemical, bio-medical, pharmaceutical, and other high tech manufacturing industries. Products of premium metal products including Inconel alloys,Incoloy alloys,Monel alloys,Haynes alloys,Hastelloy alloy,stainless steelandother superalloy. We certify to most ASME, ASTM, AMS, and military specifications as well as most international standards certification.
