One US customer asks one question about 4140 plate: is 4140 steel good for knives ?

Actually 4140 steel plate is not commonly used for knives. For general purpose of knives, we can use grade such as 1045 for knives. And we can use grades such as AISI D2 / DIN 1.2379 or high speed steel grades HSS for high end applicant.

But for 4140 steel plate, you can find 4140 steel plate used for many industries, including the defense, agricultural, and automotive industries.

is 4140 steel good for knives (1)