As I was working on my latest picture, I had to make a nice metal material, and since it took ~3 hours of tweaking, I thought I’d share it here, as a downloadable *.blend.
You can see my material and texture settings, and if you want, you can even import it into your own project (Shift-F1).
Here’s a test render, with Yafray:
And a HDRI lighted one:
The blend file, with the textures packed in: