Back (Fe-Base)

1.7182 | 27MnCrB5-2 +QT

Numeric designation1.7182
Chemical designation27MnCrB5-2
State+QT
Etching3% Nital

The micrographs show the core structure of a boron-alloyed quenched and tempered steel. It consists of martensite and bainite. The core hardness is 445 HV0.5 20 mm below the surface.