https://cyberleninka.ru/article/n/holodnolomkost-uglerodistoy- | ʙɪɢ s͇͇ᴛᴇᴘs͇͇ ғᴏʀᴡᴀʀᴅ ✔

https://cyberleninka.ru/article/n/holodnolomkost-uglerodistoy-stali-hrupkost-stali-pri-nizkih-temperaturah