Q345wani nau'in ƙarfe ne mai ƙarancin ƙarfe wanda ake amfani da shi sosai a gadoji, ababen hawa, jiragen ruwa, gine-gine, tasoshin matsi, kayan aiki na musamman, da sauransu, inda "Q" ke nufin ƙarfin samarwa, kuma 345 yana nufin cewa ƙarfin samarwa na wannan ƙarfe shine 345MPa.
Gwajin ƙarfe na q345 ya ƙunshi fannoni biyu: na farko, ko abubuwan da ke cikin ƙarfen sun kai matsayin ƙasa; na biyu, ko ƙarfin amfani, gwajin taurin kai, da sauransu na ƙarfen sun cika ƙa'idodi ta hanyar cibiyoyin ƙwararru. Yana da bambancin abun da ke cikin ƙarfe daga q235, wanda shine ƙarfe na yau da kullun na carbon da kuma q345 ƙarancin ƙarfe na alloy.
Rarraba kayan Q345
Za a iya raba Q345 zuwa Q345A, Q345B, Q345C, Q345D da Q345E bisa ga ma'aunin. Abin da suke wakilta shi ne cewa zafin tasirin ya bambanta. Matakin Q345A, babu tasiri; Matakin Q345B, Matakin zafin jiki na yau da kullun na digiri 20; Matakin Q345C, Tasirin digiri 0; Matakin Q345D, Tasirin digiri -20; Matakin Q345E, Tasirin digiri -40. A yanayin zafi daban-daban na tasiri, ƙimar tasirin suma sun bambanta.
daban.
Amfani da kayan Q345
Q345 yana da kyawawan halaye na injiniya masu kyau, aikin zafin jiki mai sauƙi, kyakkyawan filastik da kuma iya walda. Ana amfani da shi azaman jiragen ruwa masu matsakaicin matsin lamba da ƙarancin matsi, tankunan mai, motoci, cranes, injinan haƙar ma'adinai, tashoshin wutar lantarki, gadoji da sauran gine-gine, sassan injina, gine-ginen gini, da kuma gine-gine gabaɗaya waɗanda ke ɗauke da lodi mai ƙarfi. Sassan tsarin ƙarfe, waɗanda ake amfani da su a yanayin zafi ko na al'ada, ana iya amfani da su don gine-gine daban-daban a wurare masu sanyi ƙasa da -40°C.