how to resize a shape without changing radius

I have a vector logo that has a small black box with rounded corners. When I reduced it in Illustator, the corners did not scale in proportion. The box looked like an oval. After some troubleshooting, I discovered a way to fix it. In Illustator, select your object with the object tool and then go under OBJECT, then EXPAND APPEARANCE. This has maintained the corner shape throughout all the scaling I've had to do with the logo.

Goto export》export as... then select SVG. save it to a location then open the svg file in illustrator then copy and paste back to your current artboard. You can scale resize and nothing will happen to your corners.

Here's another workaround: Add a thin rule around your element. I set my stroke outside of the shape. Then you can 'Expand Appearance". This turns your shape into a regular, non-dynamic, element. Now the shape will enlarge or reduce without changing the radius of the corner. The ungroup and delete the rule.

BTW, making the shape a symbol didn't work in my case [simple box with rounded corners]. 

I know it's a couple years later but i just came across this issue and here is a quick solution.

Lots of interesting tips here to investigate – thank-you!

Doug – the shape was created by using the Pathfinder to combine a square-cornered rectangle with a rounded-corner rectangle

Eternal Warrior – the Transform panel for my shape does not show any properties … but thanks very much for alerting me to their existence! I'll know for next time

Jane-e – it's a path, but Object > Shape > Convert to shape netts me "object not converted"

Jacob – what do you mean by Transform>Move?

Myra – bingo! just the job when I want to tweak an existing shape

So now I can do what I need to, thanks to the forum – though I'm left wondering what the Scale corners checkbox in the Transform panel actually does ;-}

Try making the shape a symbol (F8) and in the Symbol Options dialog select Enable Guides for 9-Slice Scaling. Then you can protect the corners and adjust the width to whatever you want.

FieryPantone,

Given the nature of the shape, you may ClickDrag over the (3) Anchor Points of the corners of one side, then use the Transform>Move using the desired change in width.

In the upper left corner of the Control Panel, does it say your object is a Rectangle or a Path?

You can convert a Path to a Live Shape in the Object menu. Then you can use the widgets or the Control panel or the Transform panel as shown above.

Have you tried using the corner widget rather than manually the creating corners as actual paths?