Nickel 99 Welding rod
I never welded cast iron before and I found this 1/8" rod easy. I needed to weld and fill 2 cracks in an old vice. I watched a few videos, took notes and started. It turned out great going a short weld at a time and letting it cool slightly while tapping on it to relieve the pressure. No cracks. P.S.....I beveled the cracks with a small grinder.