Q345 wani nau'i ne na ƙananan ƙarfe wanda aka yi amfani da shi sosai a gadoji, motoci, jiragen ruwa, gine-gine, tasoshin matsa lamba, kayan aiki na musamman, da dai sauransu, inda "Q" yana nufin ƙarfin samar da ƙarfi, kuma 345 yana nufin cewa ƙarfin da aka samu na wannan karfe shine 345MPa. . Gwajin q345 karfe yafi hada da ...
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