Kev lag luam hauv ntau lub teb chaws siv cov qib Steel los faib ntau yam hlau los ntawm lawv cov khoom thiab lub cev thiab tau tsim los ntawm ntau lub koom haum txheej txheem.
Nyob rau hauv Basic grade designations rau qeb 1 steels (Steel grade designation system) peb siv:
ib tsab ntawv - rau npe thov
tus lej - rau kev tsim cov cuab yeej cuab tam (yield zog)
Daim ntawv thov cim: E
Daim ntawv thov: Engineering Steel
Mechanical khoom: Yam tsawg kawg nkaus Yield Strength
E yog daim ntawv thov cim rau Engineering steel & cov txheej tom ntej ntawm 3 tus lej muab cov hlau qhov tsawg kawg nkaus yield zog.
Yog li, E250 yog Engineering Steel qauv / qib uas muaj qhov tsawg kawg nkaus lub zog ntawm 250 MPa. Ntxiv mus, Nws muaj cov qib hauv qab no: A, B (BR & BO), C uas muab cov % ntawm cov pa roj carbon ie 0.42 max, 0.41 max thiab 0.39 max feem. Cov pa roj carbon feem pua poob qis ntawm qib A mus rau C piv txwv li yog tias cov pa roj carbon feem pua txo cov zog nce thiab weldability nce.
IS (Indian Standard) - tus qauv khoom ntawm Bureau of Indian Standards. Nws qhia cov qauv rau Kub-Rolled Medium thiab High Tensile Structural Steel & lawv tau muab los ntawm Bureau Of Indian cov qauv rau cov tuam txhab.
YOG:2062- yog ib qho kub dov hlau uas tuaj hauv peb qib.
