Peb yuav tsum tau txais dab tsi tam sim no rau Q345 qub?
Ua ntej Q355 (yuav tsum tau hloov kho raws li lub teb chaws tus qauv), nrog rau qhov sib npaug lossis zoo dua, thiab tuaj yeem hloov tau ncaj qha.
Q345E kim npaum li cas tshaj D?
5-10% kim dua vim qhov yuav tsum tau muaj qhov kub thiab txias siab dua thiab cov khoom seem ntau dua.
Nws puas tuaj yeem hloov Q235?
Yog, tab sis nws tsis yog kev lag luam. Q345 muaj lub zog ntau dua, tso cai rau cov hlais nyias nyias - ntu (piv txwv li, Q235 10mm → Q345 8mm), txo qhov hnyav.
Nws lifespan yog dab tsi?
Nrog kev tiv thaiv corrosion ib txwm thiab tsim nyog tsim, lub neej ntev yog ntau dua lossis sib npaug li 50 xyoo. Lub sijhawm tsim siv rau cov tsev / choj yog feem ntau 50 xyoo.
Dab tsi yog qhov tso cai tsim kev ntxhov siab?
Raws li GB 50017: Q345: 215MPa (t Tsawg dua lossis sib npaug ntawm 16mm), 205MPa (16–35mm) Q355: 225MPa (t Tsawg dua lossis sib npaug 16mm).