Hardie Plank: How to Attach to Siding

I have Hardie Plank on my home, and I would like to hang a decorative wall hanging to one of the walls of my screened porch.  What can I use to attach a hanger to the hardiplank that will allow me to hang the wall hanging.

I have tried the 3-M wall hangers that “stick” to the siding but they are not strong enough. I would like to use a decorative hanger  maybe something made out of wrought iron, but I don't know what I can use to attach it.

Can I nail into Hardie Plank or use a cement screw?

Thanks,

Carolyn