Sidee loo kala saaraa sheyga saxanka birta waa Q235 iyo Q345?

Q235 saxanka birtaiyoQ345 bir bir ahguud ahaan lama arki karo bannaanka. Farqiga u dhexeeya midabka wax lug ah kuma lahan sheyga birta, laakiin waxaa sababa hababka qaboojinta ee kala duwan ka dib markii birta la duubo. Guud ahaan, dusha sare waa casaan ka dib qaboojinta dabiiciga ah. Haddii habka loo isticmaalo qaboojinta degdegga ah, dusha sare ee abuuritaanka lakabka cufan, waxay muujin doontaa madow.
Naqshadeynta guud ee leh Q345, maxaa yeelay Q345 ka badan Q235 Iftiinka Steel, Badbaadi birta, in ka badan 235 23 keyd 15% - 20%. Naqshadeynta xakamaynta xasilloonida ee Q235 wanaagsan. Qiimaha qiimaha 3% --- 8%.

Aqoonsi ahaan, waxaa jira dhowr bayaanno:
A.
1, warshadda waxaa loo isticmaali karaa in lagu tijaabiyo qaababka alxanka ee lagu kala saaro labada aaladda. Tusaale ahaan, laba qaybood oo bir bir ah oo leh e43 alxamo alxadeed ah ayaa dhamaaday bir wareegsan, ka dibna u adeegso xoog qarib, iyadoo loo eegayo burburka xaaladda in la kala sooco labada nooc ee sheyga saxanka birta.
2, warshaddu sidoo kale waxay u isticmaali kartaa giraangiraha shiidi si ay ugu kala soocaan labada aaladda. Q25 birta leh giraangiraha shiidi marka aad shiididda, iftiinka ayaa ah walxaha wareega, midab madow. Iyo Q345 Sparks-ka ayaa ah mid dhalaalaya, midab dhalaalaya.
3, sidoo kale waxaa jira sida ku xusan labada qaybood ee midabka shaashaddu ay sidoo kale kala saari karaan labada nooc ee birta. General, Q345 xijaab lidka afkoda
B.
1, marka loo eego midabka saxan bir bir ah ayaa kala saari kara Q235 iyo Q345 ee Q345
2, Tijaabada sheyga ugu xiisaha badan waa falanqaynta kiimikada, Q235 iyo Q345 Carbon Carbon ma aha isku mid, halka kiimikada ay isku mid yihiin. (Tani waa hab nacas ah)
3, farqiga u dhexeeya sheyga Q345, oo leh alxamid: laba qaybood oo aan la garanayn oo bir ah, oo leh alxanka alxanka ee caadiga ah ee Weld, haddii ay jirto hal dhinac oo saxanka birta ah waxaa lagu cadeeyay inay tahay Q345. (Tani waa waayo-aragnimo wax ku ool ah)