hardness/toughness chart on page 2: AKS A8M spec sheet:
https://www.alphaknifesupply.com/Pictures/Info/Steel/A8M-DS-Walter.pdf
10x10mm specimen 60rc 4.5ft-lb, so a subsize 2.5x10mm 60rc is around 1.13 ft-lb <= my 1.2# was a guess from my test data. I think A8M this low because of high alloy could be a liability when dealing with tensional force. well my projection was way-off.
FYI aka FWIW - data thus far for A8MC1 (AKS #2 protocol - specsheet), A8MC2 (1875F 40 minutes soak), A8MHi (high rc), 3VC (1950F 30min), 3VHi (1950F 30min), Aebl (1950F 15min)
'C' stands for 'Control' using public ht protocol
300F tempered RC | Ft-Lb:
A8MC1: 61rc | 2.3
A8MC2: 62 | 0.6
A8MHi: 63 | 0.4
3VC: 63 | 0.8
3VHi: 64 | 0.4
Aebl: 64 | 0.7
80CrV2: 63.5+ | ~0.5
350F tempered
A8MC1: 60rc | 2.7
A8MC2: 61 | 1.4
A8MHi: 61.5 | 1.0
3VC: 62 | 1.3
3VHi: 62.5 | 0.7
Aebl: 62 | 0.8
80CrV2: 62.5 | 2.8
400F TBD