Inconel 690
High-chromium Ni-Cr-Fe alloy for nuclear steam generator tubing with superior SCC resistance.
Introduction
§01 — GeneralInconel 690 is a high-chromium nickel alloy developed specifically for nuclear steam generator tubing. The 30% chromium content provides exceptional resistance to stress-corrosion cracking in high-temperature water, making it the industry standard for PWR nuclear reactor steam generators.
Cross-Reference
Quick Facts
- UNS
- N06690
- GB
- NS3105
- Density
- 8.19 g/cm³
- Max Service Temp
- 1100°C
- Series
- Inconel
Available Product Forms
§02 — FormsKey Characteristics
§03 — FeaturesTypical Uses
§04 — ApplicationsFrequently Asked Questions
Inconel 690 FAQWhat is Inconel 690 used for?
Inconel 690 is a Inconel alloy used in Nuclear steam generator tubing, Nuclear waste vitrification, Chemical processing equipment. It offers Best-in-class SCC resistance and 30% Cr for nuclear water chemistry.
What is the chemical composition of Inconel 690?
Inconel 690 is a controlled-composition Inconel alloy supplied to ASTM B166 and ASTM B167. We provide the full mill test certificate with heat-specific chemistry on request.
What forms is Inconel 690 available in?
Inconel 690 is regularly supplied in Forging, Wire, Flange, Bar & Rod, Plate & Sheet, Pipe & Tube. Custom forms and dimensions available on request.
What is the maximum service temperature of Inconel 690?
Inconel 690 is rated for service up to 1100°C. Contact our metallurgy team for specific application recommendations.
Need Inconel 690 material?
Request a quote with your specification — grade, form, dimensions and quantity.