Here's a site that can tell you whether two steels have the same composition, though I'm not sure how the owner would feel about scraping. http://zknives.com/k

Here's a site that can tell you whether two steels have the same composition, though I'm not sure how the owner would feel about scraping. http://zknives.com/knives/steels/steelgraph.php?nm=M390%2C%2020CV%2C%20K390&hrn=1&gm=0 http://zknives.com/knives/steels/steelgraph.php?nm=M390%2C%2... It even includes manufacturing process information on individual steel pages: http://zknives.com/knives/steels/Crucible/cpm_154.shtml http://zknives.com/knives/steels/Crucible/cpm_154.shtml zknives.com/knives/steels/Crucible/154cm.shtml