It has been pointed out to me that my last post perhaps compared two samples of Cast Iron which had quite different life experiences. One from the outside of a stove, and the other sample evident had seen some action.
So I have taken a close up of a casting from the inside of my three year old stove - see the top photo with the position marked. This piece of iron is at the front of the stove and directly above the fire, so it has seen plenty of action and received a lot of heat. I obviously had to clean the soot and debris from the position to make the texture of the iron properly visible.
As you can clearly see from the above close up of the inside casting of the stove, the quality and texture of the cast is, apart from discolouration, of the same nature and texture as that of the outside.
My Blacksmith Anvil has very good quality cast iron, take a good close look at the texture and remember it when looking at stoves. The quality is testified to by the obvious smooth texture of the casting, but much more importantly, by the fact that there has been no signs of wear or burn on the fire exposed parts, or any other part of the stove for that matter, in three years to date.