In Reply to: Re: Cracked 9N Axle Housing, cast iron or cast steel? posted by Tim Daley(MI) on April 12, 2019 at 15:59:51:
Wouldn't the casting process look the same for cast steel as cast iron? I did a spark test and compared it to the spark from the engine manifold casting and a piece of steel plate and it looked like something in between. The manifold barely sparked, the axle sparked more, and the steel sparked more than that.