mõningates terastes esinev haprus peale kuumutamist termperatuurivahemikus 250-375 °C (vt pöördumatu noolutushaprumine; vrd punahaprus)
Hea teada
Nimetus tuleneb antud temperatuuridel tekkivast oksiidi sinisest värvusest.
brittleness exibited by some steels after being heated to some temperature within the range of about 250 to 375 °C (see: irreversible temper embrittlement; compare: red brittleness)
Hea teada
Characterized with blue color of oxide.
хрупкость, которая возникает в некоторых сталях после нагрева до температур в промежутке от 250 до 375 °С (ср. красноломкость)
