Nice work, keep us updated.
I work with metal and deal with metal suppliers on a daily basis and keep very
close watch on material prices, even at my cost H13 is outrageous. It is a good choice
for your given application, the chromium and molybdenum content gives it excellent
abrasion resistance and hot work capabilities.
After doing some research ( I know I'm opening up a can of worms here, LOL) full
rockwell hardness of 23-28 on H13 cannot be achieved unless perfect conditions are met and one has the proper equipment to do so.
On the other hand 4142 might be a good alternative cost wise and the fact that full rockwell
hardness of 27 can be achieved by raising both materials to 1200 degrees. The cool down
soak and reheat on H13 is where it gets a little tricky.
Yes, with the 4142 material there may be a downside as to not having the "abrasion resistance " but let me say this,when I machine this material if you do not keep some
type of flood coolant going it will "work harden". When this happens a file won't even
touch it and you think you're dealing with H13.
So basically what I'm saying is, for the light user there are alternatives. Check out
John Crouchet's website (Texas wrought iron) see what he makes his tooling for his
fly presses out of.
Food for thought and my .02