This study aims to reveal the atomic-scale effects of tempering on complex substructures and stress corrosion cracking (SCC) resistance high-strength martensitic steels. The SCC strength boron-doped Fe-0.3C-0.3Si-1.0Mn-1.0Ni-0.5Cr (wt%) steel increase concurrently without low-temperature tempering. Notably, degradation caused by is in contrast with known effect. To explore this unexpected resul...