Knife Steels

Carbon steel:
10XX or 10 standing for carbon content of a %.
i.e. 1095 is carbon “10” .95% carbon.
1050-1095 also including W1 and White #1,2&3.

Low Alloy steels:
S1, S5, 5160, 8670, L6, A6, 15N20, 80CRV, O1, O2, W2, 52100
Cruforge V etc.

High-speed tool steels and high-speed steels.
Although not always used for knife making, some do include:
S7, 3V, Caldie, A2, D2, D3, etc.

High-speed steels:
T1, M1, M2, S290, Mexamet, etc.

Stainless steels:
420 HC, AEB-L, Nitro-V, 440A, Niolox, 440C, 154CM, S35VN, S30V, S90V, etc.