Do not expose the alloy to intense heat. Although the allow can withstand a wide range of temperatures, it may begin to crack if exposed to intense heat for long periods of time. This is likely to be an issue only if you are using the alloy in industrial or laboratory settings. The alloy can withstand temperatures as high as 649 C without cracking.
Keep the alloy out of extremely hot water for long periods of time. Inconel 625 is resistant to corrosion but may begin to crack if left in water of temperatures greater than 260 C for prolonged periods.
Avoid putting more than 90 000 PSI of pressure on the sample of Inconel 625. Although the metal is extremely tough, it may begin to show signs of fatigue and eventually crack if forced to endure high volumes of pressure.
Do not heat and then rapidly cool the metal. Like any metal, if you expose the alloy to intense heat and then rapidly cool it, the metal may develop stress cracks. To avoid this, let the alloy cool naturally before immersing it in water or placing it in a cool area after heating.