If you want very realistic render, you need V-ray. In this tutorial you wiil learn
how to create chrome material. For this tutorial you need V-ray plugin. On picture below I used my chrome material.

• Open Material Editor by pressing M on your keyboard.
• Click on Get Material button, and chouse Vray material from Materail/Map Browser.

Rename material to “Chrome”

• Click on Diffuse color, and set to black.

• For the Reflec color use this settings:

Red: 242

Green: 242

Blue: 242

Turn on Fresnel reflections and Fresnel IOR. Change Fresnel IOR to 16. Set Max depth to 10. See picture below.

• In the Refraction menu change Refract color to black and change Max depth to 10. See picture below.

• Make sure that BRDF menu is set to Blinn.

That is all. Like I said this material is for V-ray. Just to know, results of this material while you render also depend from your Render and Lighting settings.