1.4539 farantin, kyawawan juriya na rashin inganci. Koyaya, kwanciyar hankali na tsarin wannan matakin ya rushe a yanayin zafi, musamman sama da 400¡¡AC. Astm ATM ATM A240 N08904 abu na iya zama zafi mai zafi a 1090-1175¡AC ya bi ta hanyar Quenching. Jiyya mai zafi ya dace da taurare. 1.4539 takardar ake amfani da ita a cikin kayan mawakin mai, ɓangare da masana'antar sarrafa takarda, tsire-tsire masu gas, da sauransu.