Welding Tips and Tricks

I have two cast iron hubs that I need to repair some serious worn areas on. The problem area is about 4" diameter and is worn up to about 3/8" deep about halfway around. These ride in nylon bushings and are a pivot point, not full rotation, and someone did not replace the worn out nylon bushings resulting in the metal-metal wear.

From what I think I know about this type of repair I think the part will need pre-heating (O/A) and then buildup with a nickel type stick electrode, followed by turning back to proper diameter in the lathe. Can those who have done this before give me some advice on pre-heat target temp, rod selection and anything else I need to know before attempting this?

Thanks,

Pete

When I have a chance later I will try the spark / file tests to try to confirm the material. TIG is also an option if it might be better.

More searching and it's appearing that TIG brazing with ERCuAl-A2 may be the best bet and far cheaper than nickel rod.