Dab tsi yog qhov txawv ntawm LR EH50 thiab LR EH55 steel phaj? - Kev Paub

LR EH50 yog ib qho ntxiv -siab- lub zog marine steel phaj ntawv pov thawj los ntawm Lloyd's Register (LR). Qib "E" qhia tau hais tias nws muaj kev cuam tshuam los ntawm -40 ° C, kom ntseeg tau zoo heev rau cov hlab ntsha ua haujlwm hauv qhov chaw txias. Nws muaj qhov tsawg kawg nkaus lub zog ntawm 500 MPa thiab tensile lub zog xws li 610 txog 770 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 18% rau thicknesses txog 100 hli. Kev cuam tshuam lub zog xav tau yog 33J (transverse) thiab 50J (ntev) ntawm -40 ° C. Cov tshuaj muaj pes tsawg leeg yog nruj me ntsis tswj nrog carbon ≤0.20% thiab manganese ≤1.70%.

LR EH55 yog ib qho ultra-siab- lub zog marine steel phaj kuj tau ntawv pov thawj los ntawm Lloyd's Register (LR), nrog rau kev cuam tshuam toughness kuaj ntawm -40 ° C. Lub "55" qhia txog qhov tsawg kawg nkaus lub zog ntawm 550 MPa thiab lub zog tensile xws li 670 txog 830 MPa, nrog qhov tsawg kawg nkaus elongation ntawm 18%. Kev cuam tshuam lub zog xav tau yog 37J (transverse) thiab 55J (ntev) ntawm -40 ° C. Nws cov tshuaj muaj pes tsawg leeg zoo ib yam li EH50, tab sis feem ntau yuav tsum tau ua kom zoo dua kom ua tiav lub zog siab dua thaum tuav lub zog.

Ob leeg LR EH50 thiab LR EH55 yog LR- ntawv pov thawj ntxiv- siab- lub zog marine steels nrog zoo heev qis- qhov kub thiab txias tau sim ntawm -40 ° C, kom ntseeg tau tias kev ua tau zoo hauv cov dej hiav txwv hnyav. Lawv thawj qhov sib txawv yog nyob rau hauv lub zog theem: EH50 muaj qhov tsawg kawg nkaus yield zog ntawm 500 MPa nrog tensile lub zog ntawm 610-770 MPa, haum rau high-strength hull tsim, thaum EH55 muab ib tug siab dua qhov tsawg kawg nkaus yield zog ntawm 550 MPa nrog tensile lub zog ncav cuag 670-830 MPa kev thov. Ob qib tshwj xeeb tswj cov tshuaj muaj pes tsawg leeg nrog cov pa roj carbon ≤0.20% thiab tswj cov vuam zoo rau cov kev pabcuam tseem ceeb hauv hiav txwv, txawm tias EH55 yuav xav tau cov txheej txheem vuam ntau dua vim nws lub zog ntau dua.

Tshuaj muaj pes tsawg leeg

LR EH50 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 50	0.20	0.55	1.70	0.030	0.030	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

LR EH55 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH55	0.20	0.55	1.70	0.030	0.030	0.015	0.020
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02

Mechanical Property

LR EH50 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 50	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t≤50	500	610-770	18%		33	50
	50 t 70	500	610-770	18%		33	50
	70＜t≤100	500	610-770	18%		33	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR EH55 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH55	mm	Min Mpa	Mpa	Tsawg%	-40	J	J
	t≤50	550	670-830	18%		37	55
	50 t 70	550	670-830	18%		37	55
	70＜t≤100	550	670-830	18%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev