H-2

H-2 consists of:

Carbon

Chromium

Cobalt

Copper

Manganese

Molybdenium

Nickel

Nitrogen

Phosphorus

Silicon

Sulfur

Tungsten

Vanadium

0.09

13.73

/

0.17

0.31

2.24

8.25

0.06

0.03

2.63

/

/

/

History, mentionings from the forums etc.

In this post on the Spyderco.com forum, from 8 June 2022, Sal Glesser shares some of the development history of H-2 steel:

A few years ago, we were informed that Myodo was going to stop making H1. A shock to be sure. Myodo is a foundry that owned by a Korean conglomerate and who knows how far up the line the decision was made. My guess is some "suit" sleeping with "bottom lines" made and implemented the decision. we were not able to find out any information regarding the decision.

At that time, we and our Japanese partners of 40+ years began the search for a company capable of making a steel with the same properties and a rolling mill to roll the material. After much effort, we "created" H2. We did our normal testing of the material and found it to be as good, if not a bit better than H1. I guess we could have just called it H1, but the chemistry was different and we felt it would be deceptive to say it was the same when it wasn't.