Q235B belongs rau carbon structural steel.
"Q" yog tus lej hlau, sawv cev rau qhov taw tes tawm
"235" yog tus nqi taw tes tus nqi nrog rau chav MPa
"B" sawv cev rau qib zoo, thiab muaj plaub qib A, B, C, D tag nrho.
Qee zaum cov cim rau deoxidation txoj kev xws li F, b, Z thiab TZ raug ntxiv rau qhov kawg ntawm tus lej hlau.
"F" yog hais txog rimmed steel
"b" yog hais txog semi-tua steel
"Z" yog hais txog kev tua hlau
"TZ" yog hais txog tshwj xeeb tua hlau.
