Qhov sib txawv ntawm S355G3+N thiab S355G9+N steel phaj - Kev Paub

S355G3+N thiab S355G9+N yog qhov zoo li qub- cov qauv steel phaj ua raws li European tus qauv EN 10025-4. Qhov kev xaiv qhia tau hais tias qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa, nrog rau "+ N" suffix qhia qhov kev xa khoom zoo. Qhov tseem ceeb "G" tivthaiv xaiv cov qib no rau kev siv qis (sub-zero) qhov kub thiab txias, nrog rau cov lej hauv qab no qhia txog qhov lav qhov tsawg kawg nkaus Charpy V-notch cuam tshuam lub zog (hauv Joules) ntawm qhov ntsuas kub tshwj xeeb. Cov qib no yog tsim los rau cov txheej txheem welded tseem ceeb hauv kev xav tau qhov chaw txias, xws li cov chaw sab nrauv, Arctic nkoj, cryogenic cia, thiab cov txheej txheem hauv huab cua txias.

Qhov txawv tseem ceeb:

Qhov sib txawv tseem ceeb nyob rau hauv lawv qhov qis -kub toughness specifications. S355G3+N raug kuaj ntawm -20℃nrog kev lees paub yam tsawg kawg nkaus lub zog ntawm 40 Joules. Hauv qhov sib piv, S355G9+N raug kuaj ntawm qhov kub qis dua ntawm -60℃thaum lav qhov tsawg kawg ntawm 27 Joules. Qhov no sawv cev rau qhov sib txawv tseem ceeb hauv daim ntawv thov: S355G3+N yog haum rau cov kev pab cuam txias me ntsis, whereas S355G9+N yog engineered rau cov mob hnyav heev Arctic los yog tob-cryogenic.

Ua kom muaj zog ntawm -60℃rau S355G9+N xav tau txoj hauv kev kom nruj dua hlau piv rau S355G3+N. Nws yuav tsum muaj ib qho tshwj xeeb huv steel muaj pes tsawg leeg nrog tsawg heev impurities (sulfur, phosphorus) thiab meej tswj ntawm micro-alloying ntsiab (xws li Niobium) thaum lub sij hawm normalizing kom ib tug ultra- zoo, homogeneous grain qauv uas tiv taus nkig tawg thaum huab cua txias. Yog li ntawd, kev vuam thiab kev tsim ntawm S355G9+N yog qhov xav tau ntau dua. Nws tso cai rau kev siv cov khoom siv tshwj xeeb uas tsim nyog vuam, kev tswj xyuas nruj ntawm cov khoom siv hluav taws xob, thiab feem ntau preheating los tiv thaiv kev puas tsuaj ntawm thaj chaw kub-tshuaj tiv thaiv lub zog.

S355G3+N Chemical Composition

S355G3+N	Cov ntsiab lus Max (%)
	C	Si	Mn	P	S	Nb	V	Ti	Al	Cr	Ni	Mo	Cu	N
	0.18	0.50	0.90-1.65	0.030	0.025	0.060	0.12	0.030	0.020	0.30	0.50	0.10	0.35	0.015

S355G9+N Chemical Composition

Qib	C	Si	Mn	P	S	Ni	Cr	Mo	Cu
S355G9+N	Tsawg dua lossis sib npaug li 0.12	0.15-0.55	Tsawg dua lossis sib npaug li 1.65	Tsawg dua lossis sib npaug li 0.02	Tsawg dua lossis sib npaug li 0.010	Tsawg dua los yog sib npaug li 0.7	Tsawg dua los yog sib npaug li 0.2	Tsawg dua los yog sib npaug li 0.08	Tsawg dua lossis sib npaug li 0.3
Nb	V	Ti	Alt	N	B	Ca	Pb	Sib Max	Pcm Max
Tsawg dua lossis sib npaug li 0.03	Tsawg dua los yog sib npaug li 0.06	Tsawg dua lossis sib npaug li 0.025	0.015-0.055	Tsawg dua lossis sib npaug li 0.010	Tsawg dua lossis sib npaug li 0.0005	Tsawg dua los yog sib npaug li 0.005	Tsawg dua lossis sib npaug li 0.010	Tsawg dua lossis sib npaug li 0.43	Tsawg dua lossis sib npaug li 0.22

S355G3+N steel phaj Mechanical Property

S355G3+N	Yield zog mm Min (Mpa)		Tensile zog mm Min (Mpa)						Elongation Min,%
	Yield zog mm Min (Mpa)		Tensile zog mm Min (Mpa)
	Tsawg dua los yog sib npaug 100	＞100	Tsawg dua los yog sib npaug li 16	＞ 16 Tsawg dua los yog sib npaug 25	＞ 25 Tsawg dua los yog sib npaug 40	＞ 40 Tsawg dua los yog sib npaug 63	＞ 63 Tsawg dua los yog sib npaug 100	＞ 100 Tsawg dua los yog sib npaug 150	22
	470-630	–	355	345	345	–	–	–	22

S355G9+N steel phaj Mechanical Property

Qib	S355G9+N steel phaj Mechanical Properties (min) tshwj tsis yog hais
	Tensile zog		Yield zog						Elongation A
	Thickness (hli)		Thickness t - hli						Elongation A
	Tsawg dua los yog sib npaug li 100	>100	Tsawg dua los yog sib npaug li 16	16	25	40	63	100	%
S355G9+N	470/630	–	355	355	345	335	325	–	22