Answer
SAE 1070 carbon karfe ana amfani dashi akai-akai don maɓuɓɓugan ruwan raƙuman ruwa masu tsada, amma tsarin sanyi yana gabatar da mahimmin damuwa mai saura a magudanar ruwa. Ba tare da ingantacciyar maganin zafi na rage damuwa ba (yawanci $600-650 ^°F$ na mintuna 30), waɗannan ragowar matsalolin suna haɗawa da nauyin aiki don wuce ƙarfin amfanin kayan, wanda ke haifar da 'saitin' ko gazawar gajiya da wuri. Bugu da ƙari kuma, idan bazara ta kasance electroplated ga lalata juriya (misali, zinc plating), yana da matukar saukin kamuwa da hydrogen embrittlement. Atomic hydrogen na iya yin ƙaura zuwa wuraren da ake fama da damuwa na iyakokin hatsi, yana haifar da karaya kwatsam. Zagayowar yin burodi a $375^°F$ na akalla sa'o'i 4 nan da nan bayan plating ya zama tilas don fitar da hydrogen.
