### 1.Diference ntawm Q235A thiab Q235B
Q235A thiab Q235b yog ob qho tib si cov qauv roj hauv qab Suav txheej txheem GB / T 700, tab sis lawv txawv hauv cov tshuaj lom neeg thiab cov khoom siv neeg siv neeg. Q235A muaj cov ntsiab lus roj teeb txo qis thiab tsis xav tau kev cuam tshuam nyuaj, ua rau nws tsim nyog rau cov ntawv thov vuam tsis tseem ceeb. Nyob rau hauv sib piv, Q235B muaj cov ntsiab lus carbon ntau dua thiab yuav tsum ua kom muaj kev cuam tshuam nyuaj rau ntawm 20 degree, uas ua rau nws tsim nyog dua rau kev ua kom zoo dua qub thiab tawm tsam rau brittle breature.
### 2.Difference ntawm qib A thiab qib B Steel Yeeb Nkab
Nyob rau hauv cov ntsiab lus ntawm cov pipes hlau ua los ntawm Q235 Khoom siv, Qib A (Q235A) thiab qib B (Q235B) Xa cov khoom siv cov khoom siv hauv cov yeeb nkab. Qib Ib Cov Kav Hlau Steel yog tsim los ntawm Q235A hlau, uas tsis muaj qhov kev xav tau nyuaj thiab yog feem ntau siv hauv kev tsim kho lossis qis} kev muaj kev ntxhov siab ib puag ncig. Qib B Steel kav yog tsim los ntawm Q235b hlau, uas suav nrog cov kev sib tw ua haujlwm ntawm kev siv vuam lossis cov kev tsim qauv kev coj ua uas xav tau kev pab tau ntau dua.
### 3.Difdence ntawm Q235C thiab Q235B
Q235C thiab Q235b yog ob qib ntawm Q235 cov hlau hlau, tab sis Q235C muaj kev txhim kho zoo dua. Q235B yuav tsum muaj kev cuam tshuam kev nrawm ntawm 20℃thiab muaj ntau cov ntsiab lus carbon ntau thiab yuav tsum ua kom muaj kev cuam tshuam cov kev cuam tshuam cov khoom muaj nyob ntawm 0 degree. Qhov no ua rau Q235C ntau tiv taus qis -} kub ua rau ib puag ncig nrog cov khoom siv khov kho yog qhov tsim nyog, xws li hauv cov choj lossis cov tshuab hnyav.
### 4.What yog Q235b steel?
Q235b steel yog ib qho khoom siv roj carbon ua ke los ntawm Suav tus qauv GB / T 700. Nws muaj tsawg kawg nkaus muaj zog ntawm 2300. Cov tshuaj lom neeg muaj pes tsawg leeg feem ntau yog tswj cov roj carbon, silicon, manganese, phosphorus, thiab leej faj. Q235B tau siv dav hauv kev tsim kho, tshuab, thiab welded qauv vim nws lub zog zoo, thiab weldility, ua rau nws muaj ntau yam khoom siv rau ntau yam kev siv khoom.
### 5.What yog Q235A steel?
Q235A steel yog qib ntawm carbon qauv hlau raws li Suav qauv qauv GB / T 700, nrog tsawg kawg nkaus zog muaj zog ntawm 235 MPa. Nws muaj cov ntsiab lus hnyav dua thiab tsis xav tau kev cuam tshuam nyuaj, uas ua rau nws tsis tshua muaj nqi thiab cov khoom siv nrawm nrawm lossis cov ntaub ntawv kev ua haujlwm tsis tseem ceeb. Txawm li cas los xij, nws yuav tsis raug pom zoo rau cov ntawv thov uas muaj kev thauj khoom tsis muaj zog lossis qis dua vim nws qhov tsis muaj kev cuam tshuam tsis kam.
