So, what is the difference, and why use 2 different types of steel in your forged iron offerings?
From a metal standpoint, the characteristics of the materials, specifically the hardness, are very similar. 8620 is a form of carbon that is used when casting carbon steel because it flows better into the cast tool. In form forging, the first step is to cast the head, then after casting, it goes through one forged press process. That is what form forging is. 1035, 1025 etc. are more usually used to describe the carbon steel used in a billet forging. Billet forging is simply where a billet of material is hammered into it’s final shape by going through a series of heating and forging steps.
I think they use the 8620 in their “form forgings” and the 1035 in their “true forgings”.
I had the M45’s years ago. Best irons I ever bagged. Wish they still had conforming grooves. Haven’t been able to find a suitable replacement yet, and I’ve tried and tried. Oh well…they were 8620 form forged, but I just loved the depth and richness of the feel. I have the DBM irons now…they are true-forged 1035. They feel nice, but to me, not as deep or rich. Just me. I know they are revered by so many…and they are beautiful, for sure, but I think they feel just a bit light to me. Analogous to a light-bodied beer vs. a full-bodied beer. I just loved the 8620 form forged feel compared to the DBM’s. It might also be related to the deeper cavity and/or the very thin top of the DBM’s compared to the M45’s…not sure.