Qib A Shipbuilding steel phajyog siv rau shipbuiling lub hull qauv thiab platform. Lub nkoj tsim steel phaj qib A yog cov khoom siv tensile zog steel. Marine qib steel phaj muaj cov khoom zoo toughness thiab muaj zog dua, muaj zog corrosion-ua hauj, kev ua haujlwm, thiab vuam zog.ASTM A131 Qib A steel phajtuaj yeem siv rau hauv kev tsim khoom ntawm lub nkoj lub hull qauv uas nws qhov hnyav yog qis dua 10000 tons, thiab feem ntau ua navigation ncig ntug hiav txwv thiab dej hiav txwv.

Qib A steel phaj rau shipbuilding specification:
Thickness: 4mm-260mm,
Dav: 1200mm txog 4000mm
Ntev: 3000mm txog 18000mm.

Qib A steel phaj Chemical Composition

Qib	C max	Si max	Mn	P max	S max
Qib A	0.21	0.50	Ntau dua lossis sib npaug 2.5C	0.035	0.035

Lus Cim: CE: C+1/6MnTsawg dua los yog sib npaug0.40%
Cu Less tshaj los yog sib npaug rau {{0}}.35%, Ni Less tshaj los yog sib npaug rau 0.30% Tsawg dua los yog sib npaug

Qib A shipbuilding steel phaj Mechanical Property

Qib	Rm (MPa)	Re (MPa) min	A% min	Akv/J min
Qib A	400-520	235	22	ET degree	Thickness (hli)
				20	Tsawg dua los yog sib npaug50		>50-70		>70-100
					L	C	L	C	L	C
					-	-	34	24	41	27

Nco tseg: Hauv daim ntawv teev npe, Rm: tensile zog, Re: Yield zog, A%: elongation, ET: kev ntsuas kub, L: lengthways, C: crosswise.

Cov xwm txheej ntawm kev xa khoom

Qib	qeb	Lub thickness ntawm steel
		Tsawg dua los yog sib npaug li 12	>12.5-25	>25-35	>35-50	>50-100
Qib A	Phaj / ntawv	A(-)				N(-), TM(-) CR (50) AR * (50)
	Hlau profile					-

Nco tseg: 1. Kev xa khoom: A =Txhua yam ; N=Normalized ; CR=Control Rolled ; TM=TMPC, Kub - deformation tswj dov; AR*= Tau kub dov nrog kev pom zoo ntawm Classification Society ; CR*=Tuaj yeem tswj tau nrog kev pom zoo ntawm Classification Society .

2.Cov duab nyob rau hauv ( ) txhais tau hais tias lub ntim sampling los ua qhov kev ntsuam xyuas qhov cuam tshuam, chav tsev yogTon.(-) txhais tau tias tsis muaj kev cuam tshuam kev kuaj.Txawm li cas los xij hauv cov qauv sib txawv