As long as you've boughtt them less than 12 months ago, they'll definitely warranty. If it's 2 years then maybe.
I did the same to my old 120 FR (blue and orange ones) - cracked the shell over the instep. I worked in a shop that dealt Lange at the time and they were totally cool with me. They sent me new complete boots and let me go for the regular Comp 120 instead of the FR, which worked better for me.