INFI is my all time favorite steel and insiders like mike stewart have said they believe INFI to be A8 tool steel with jerry's proprietary heat treat.
while mike is extremely knowledgeable we have no way of knowing if he is correct or not.from what i've heard the busse crew vehemently deny that INFI is A8.
other than this topic i've never even heard of A8.i wonder why you dont see others using it.
The analysis of both steels shows that is incorrect though:
Infi:
V 0.36% Vanadium
Cr 8.25% Chromium
Fe 87.79% Iron
Co 0.95% Cobalt
Ni 0.74% Nickel
Mo 1.3% Molybdenum
C 0.5% Carbon
N 0.11% Nitrogen
A8:
Cr 4.75-5.50 Chromium
Ni 0.30 Nickel
Mo 1.15-1.65 molybdenum
C 0.50-0.60 Carbon
Mn 0.50 Manganese
Si 0.75-1.10 Silicon
W 1.00-1.50 Tungsten
Cu 0.25 Copper
P 0.03 Phosphorus
S 0.03 Sulfur
FYI, Jerry has confirmed that the analysis of Infi is accurate.
