Tsim cov qauv ASME B36.10 ASME B36.43
Ferritic Alloy Steel Kav yog suav tias yog muaj cov chromium cov cheem siab thiab cov pa roj carbon tsawg. Cov Pipe Sib Nqus Sib Nqus Sib Nqus Muaj cov ntsiab lus tseem ceeb suav nrog kev ua kom zoo, xeb tawm tsam thiab cuam tshuam nrog kev sib tsoo ntawm corrosion. Yog li, ib daim ntawv lees paub alloy steel kav yog feem ntau siv hauv kev siv hauv kev siv hauv kev siv hauv chav tsev ua noj, chav ua noj thiab cov ntawv thov siv khoom.
Nruj me ntsis kev hais lus, txhua tus steel yog ib qho alloy, tab sis tsis yog txhua tus hlau yog hu ua "Alloy Steel". Cov hlau yooj yim tshaj plaws yog hlau (FE) suav nrog cov pa roj carbon (c) (txog 0.1% rau 1%, nyob ntawm seb puas muaj dab tsi (tshwj tsis yog cov neeg negrigible traces); Cov no yog hu ua cov hlau siv roj carbon. Txawm li cas los xij, lub sij hawm "hlau" yog tus qauv uas yog hais txog cov hlau nrog lwm cov khoom sib txuas ntxiv rau cov pa roj carbon. Ib txwm muaj willoyants suav nrog manganese (npib tsib xee), npib tsib xee, chromium, molybdenum, vanadium, silicon, thiab boron. Tsawg dua cov ubyants suav nrog txhuas, cobalt, cerium, cerium, cerium, cerium, titanium, tungsten, tin, zinc, thiab zirconium.
A \ / sa387 gr 9class 2 weldable carbon steel phaj rau qhov kub siab lub nkoj thiab boilers. Cov khoom tau txais txiaj ntsig los ntawm cov chromium ntxiv cov chromium thiab molybdenum, uas muab cov hlau zoo corrosion thiab kub tiv taus. A-/ SA387 Qib 9 yog npaj rau kev siv los ntawm cov tuam ntxhab pabcuam roj, roj thiab petrochemical Industries.