Here’s a good rundown of what to check for when you’re wisely noting the type of steel that knife you have your eyes on is made out of.
CPM-S30V
This is an American steel with a terrific balance between edge retention, durability, and corrosion resistance.
The smartest uses for a CPM-S30V knife would be hunting or survival.
CPM-S90V
Steel workers would know CPM-S90V is one of the most advanced steels available, with incredible edge retention and great corrosion resistance.
Any high demand use can be handled by this type, be it hunting or otherwise.
N680
N680 is an Austrian Steel with unparalleled corrosion resistance.
Because it’s not susceptible to corrosion, N680 is ideal for marine, diving, or fishing knives.
440C
Some would remember 440C steel as a high performance steel, and while still good, it is now below average on everything but corrosion resistance.
You really wouldn’t want to use 440C for anything other than hunting or fishing.
D2
An American made, air hardened tool steel, D2 is pretty unstoppable. It’s an industrial grade, semi-stainless steel and is extremely durable and tough, but not great for corrosive environments so is best when coated black.
Many tactical knives are made of D2, and for good reason.
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