Cov khoom sib npaug ASTM rau Q355B steel yogASTM A572 Qib 50. ASTM A572 Qib 50 yog cov qauv hlau uas muaj lub zog siab thiab cov ntsiab lus tsis tshua muaj hlau uas tau siv dav hauv cov qauv siv. Ob Q355B thiab ASTM A572 Qib 50 muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa (50 ksi) thiab muaj cov khoom zoo sib xws.
ASTM A572 Qib 50 muaj qhov zoo tshaj plaws weldability thiab formability, ua rau nws haum rau ntau yam ntawm cov qauv siv, xws li txuas hniav, vaj tse, thiab tshuab. Nws muaj lub zog-rau-qhov hnyav dua piv rau ntau lwm qib steel, muab cov peev txheej zoo dua.
Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias, thaum Q355B thiab ASTM A572 Qib 50 muaj qee qhov zoo sib xws, lawv tsis yog cov sib txuas ncaj qha.
Thaum sib piv qhov sib npaug ntawm cov qauv steel, nco ntsoov tias cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv kho tshuab yuav txawv me ntsis. Thaum xaiv cov khoom sib piv ASTM rau Q355B steel, nws raug nquahu kom koj tshuaj xyuas cov kev qhia tshwj xeeb thiab cov qauv siv lossis nrhiav kev pabcuam kws tshaj lij rau cov ntaub ntawv raug.
