Flat surface is now curved... WHY?

[Nicko_Airbus 2]

I just printed this part in Nlyon, it is supposed to be flat and I'm 100% sure that it was flat while printing. But how come is it all curvy now ?

 

I submerged the part under water at 50C degrees to remove the support. My bed temperature is at 80 degrees while printing and the print core temperature is 250C degrees.

 

Is my support too soft ? Did I put my part under water too fast after printing ? Thanks for the help!

 

I took screen shots of my printing settings and also the slicing.

 

I'm using Cura 4.8.0 on a Ultimaker Pro Bundle

[ahoeben 1,697]

Are you certain the water wasn't hotter than 50 degrees? Hot water can warp prints.

[Nicko_Airbus 2]

5 hours ago, ahoeben said:

Are you certain the water wasn't hotter than 50 degrees? Hot water can warp prints.

Yes I'm 100% sure. 

[ahoeben 1,697]

Then next time, try water that is just 30 degrees.

 

You can cut off a piece of filament and submerge it in the warm water. If it becomes malleable in the warm water, then so will your print.