1.Dab tsi yog qhov txawv ntawm Q235B thiab 20# steel nyob rau hauv muaj pes tsawg leeg?
Teb: Q235B muaj cov ntsiab lus carbon max ntawm 0.20% nrog siab dua phosphorus / sulfur txwv, thaum 20 # hlau tau tswj cov pa roj carbon (0.17-0.23%) thiab qis impurities . 20# tuaj yeem muaj cov ntsiab lus alloying xws li Cr thiab Ni.
2.Dab tsi yog qhov txawv ntawm Q235B thiab 20# steel hauv cov khoom siv tshuab?
Teb: Q235B muaj lub zog tawm los 235 MPa thiab tensile lub zog 375-500 MPa, thaum 20 # steel muaj zog yield zog (Ntau dua los yog sib npaug rau 245 MPa) thiab tensile zog (Ntau dua los yog sib npaug rau 410 MPa), nrog zoo toughness.
3.Cov hlau twg zoo dua rau kev siv cov qauv, Q235B lossis 20#?
Teb: Q235B yog ntau dua rau kev siv cov qauv siv vim yog tus nqi qis, thaum 20 # nyiam rau cov khoom uas xav tau lub zog siab dua thiab cov khoom siv kho tshuab zoo dua.
4.Cov hlau twg zoo dua rau cov kav dej siab, Q235B lossis 20#?
Teb: 20# steel yog qhov zoo dua rau cov kav dej siab vim muaj zog dua thiab tawv, haum rau siab -siab tshuab. Q235B yog siv rau kev siv qis -siab.
5.Dab tsi yog qhov cuam tshuam toughness ntawm Q235B steel?
Teb: Q235B steel muaj qhov cuam tshuam lub zog ntawm Ntau dua lossis sib npaug ntawm 27 J ntawm chav tsev kub.
