Inconel690 alloy is an austenitic nickel-based corrosion resistant alloy containing 30%Cr. It not only has better stress corrosion cracking resistance than Inconel600, Inconel800 and 304 stainless steel in chloride solution and sodium hydroxide solution, but also has higher strength, good metallurgical stability and excellent processing characteristics. Inconel690 alloy shows low corrosion rate and excellent stress corrosion resistance, especially in various types of high temperature water. These properties are very suitable for nuclear waste treatment devices, steam generators and nitric acid-resistant parts.
Chemical composition (%)
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Nickel ............................. ≥58.0
Chrome .......................... 27.0-3 1.0
(UK) Continuing Education .......................... 7.0- 1 1.0
C..............................≤0.05
............................. of silicon ≤0.50.
Manganese ............................. ≤0.50.
S.............................≤0.0 15
Copper .............................. ≤0.5
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Physical characteristics (room temperature):
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Density (g/cm3) 8. 19.
Melting point (℃) 1343- 1377
Specific heat (j/kg-℃) 450.
Resistivity (? ω-m)…… 1. 148