Nitrided Ferro Chrome Size: 10-100mm or as customer's option Nitrided Ferro Chrome Spec:1. Cr 60%min, N 3-5%, C 0.03-0.1%, Si 1.5-2.5%, P 0.03%max, S 0.04%max 2. Cr 60%min, N 6-9%, C 0.03-0.1%, Si 1.5-2.5%, P 0.03%max, S 0.04%max 2. Cr 60%min, N 3-5%, C 0.03-0.1%, Si 1.0%max, P 0.03%max, S 0.04%max.