Iron ƙwanƙwasa, wanda kuma aka sani da ƙarfen simintin gyare-gyare na nodular ko spheroidal graphite iron, babban nau'in simintin ƙarfe ne wanda ke da kayan aikin injiniya na musamman. Ba kamar ƙarfen simintin gyare-gyare na al'ada ba, wanda ke da rauni kuma mai saurin fashewa, an san ƙarfen ductile don ƙarfinsa, dorewa, da sassauci. Wadannan ...
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