Ko te tikanga, karekau he aukume te kowiri tira austenitic.Engari he aukume to te martensite me te ferrite.Heoi ano, he autō te austenitic.Ko nga take e whai ake nei:

Ina whakamarokehia, ka mahue te aukumetanga etahi na runga i etahi take whakarewa;tangohia te 3-4 hei tauira, 3 ki te 8% te toenga he ahuatanga noa, no reira me uru te austenite ki te aukume kore, ki te aukume ngoikore ranei.

Ko te kowiri tira Austenitic ehara i te aukume, engari ka puta te wahanga γ ki te wahanga martensite, ka puta te aukumetanga i muri i te whakamaroketanga makariri.Ka taea te whakamahi i te maimoatanga wera ki te whakakore i tenei hanganga martensite me te whakaora i tana kore-aukume.