Here is my fleet of splitting wedges: all dressed up and no where to split!
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Top wedge, in the middle, and 3 wedges at bottom right, have little or no use. The other 6 have been used extensively, and just cleaned up nicely. Some had mushroomed edges sticking out as much as 1/2 inch at the top!
The blue wedges, and the black wedge (top row, second to the left) have the densest feeling steel. I can't imagine that cast wedges would hold up well, but I am sure that there are differences in the steel, and the forging methods used.
I will have to pack them into my carry on luggage and go visit some of those guys with the monster oaks to split!
Philbert