Qhov sib txawv ntawm S355G9+M thiab S355G10+M steel phaj - Kev Paub

S355G9+M yog ib qho thermomechanical dov offshore structural steel ntawv pov thawj raws li EN 10225 rau kev ruaj khov offshore qauv, cua turbine foundations, thiab Arctic roj/gas platforms . Cov lus "+M" qhia txog cov txheej txheem thermomechanical tswj (TMCP), uas ua kom cov txheej txheem nplej los ntawm kev tswj dov thiab ua kom txias txias yam tsis muaj kev kho cua sov ntxiv. Nws muaj qhov tsawg kawg nkaus yield zog ntawm 355 MPa (rau thickness Tsawg dua los yog sib npaug rau 16 hli) thiab tensile lub zog ntawm 470 mus rau 630 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 22%. Qhov siab tshaj plaws phaj thickness yog 100 hli. Impact toughness yog kuaj ntawm -60℃nrog qhov tsawg kawg nkaus lub zog yuav tsum tau ntawm 27 Joules. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.12%, manganese Tsawg dua lossis sib npaug li 1.65%, thiab cov sulfur tsawg dua lossis sib npaug li 0.010%.

S355G10+M kuj yog ib qho thermomechanical dov offshore structural steel ntawv pov thawj raws li EN 10225, sib koom tib yam tsawg kawg nkaus yield zog ntawm 355 MPa thiab tensile zog ntau yam ntawm 470-630 MPa li G9 . Txawm li cas los xij, S355G{101} kev cuam tshuam qis-temperature℃nrog rau qhov tsawg kawg nkaus lub zog yuav tsum tau ntawm 27 Joules. Txhawm rau ua tiav qhov kev ua tau zoo no, nws siv cov tshuaj lom neeg muaj pes tsawg leeg tswj hwm, suav nrog kev txwv qis dua (tsawg dua lossis sib npaug rau 0.005% vs{13}}%) thiab qis dua phosphorus (tsawg dua lossis sib npaug rau 0.015% vs. 0.020%) . Qhov siab tshaj plaws phaj thickness kuj yog 100 hli.

Ob leeg S355G9+M thiab S355G10+M yog cov thermomechanical dov offshore structural steels raws li EN 10225 nrog cov khoom zoo tib yam (tsawg kawg yield 355 MPa, tensile 470-630 MPa). Lawv qhov sib txawv tseem ceeb nyob rau hauv qhov ntsuas kub ntawm qhov ntsuas kub: S355G9+M raug kuaj ntawm -60 degree, haum rau kev siv dav hauv Arctic offshore, thaum S355G10+M raug kuaj ntawm qhov kub siab tshaj -70 degree, muab qhov zoo tshaj qhov kub thiab txias rau qhov xav tau tshaj plaws cryogenic ib puag ncig xws li LNG carrier. Yog li ntawd, S355G10+M yuav tsum muaj kev tswj xyuas cov tshuaj purity nruj dua (tshwj xeeb tshaj yog qis sulfur thiab phosphorus) thiab xav tau cov txheej txheem vuam ntau dua . Ob qib yog muaj txog li 100 hli thickness. Kev xaiv ntawm lawv nyob ntawm seb qhov project xav tau tus qauv Arctic kev ua tau zoo (G9) lossis qhov kub tsis tshua muaj zog (G10) rau cov ntawv thov tseem ceeb tshaj plaws.

S355G9+M Steel phaj Chemical Composition

C	Si	Mn	P	S	Cr	Mo	Ni	Al	Cu	N	Nb	Ti	V	Nb + V
0.12	0.15/0.55	1.65	0.02	0.01	0.20	0.08	0.7	0.015/0.055	0.3	0.01	0.03	0.025	0.06	0.06

S355G10+M Steel phaj Chemical Composition

C	Si	Mn	P	S	Cr	Mo	Ni	Al	Cu	N	Nb	Ti	V	Nb + V
0.12	0.15/0.55	1.65	0.015	0.005	0.20	0.08	0.7	0.015/0.055	0.3	0.01	0.03	0.025	0.06	0.06

S355G9+M Steel phaj Mechanical Properties

Qib	S355G9+M 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+M	470/630	–	355	355	345	335	325	–	22

S355G10+M steel phajMechanical Properties

Qib	S355G10+M Steel phaj Mechanical Properties (min)
	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<>	%
S355G10+M	470/630	–	355	355	345	335	325	–	22