Qhov sib txawv ntawm LR DH46 thiab LR DH50 steel phaj

Dec 18, 2025 Tso lus

LR DH46 thiab LR DH50 yog Lloyd's Register (LR) cais shipbuilding steels, nrog rau qhov sib txawv ntawm lawv lub zog: DH46 muaj qhov tsawg kawg nkaus yield zog ntawm 460 MPa, thaum DH50 muab lub zog siab dua nrog qhov tsawg kawg nkaus tawm los ntawm 500 MPa, ua tiav los ntawm cov kev tswj zoo sib xws ntawm cov khoom sib xws, tab sis sib txawv ntawm cov khoom sib txawv ntawm cov khoom siv hluav taws xob, xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob. kev kho mob (normalized) rau txhim kho toughness thiab weldability nyob rau hauv marine lug, ua DH50 haum rau ntau thov kev thov.

LR: Lloyd's Register, kev faib pawg neeg.

D: Siab zog.

H: Normalized (kub kho).

46/50: Yam tsawg kawg nkaus tawm lub zog hauv kgf/mm² (los yog 460/500 MPa).

Tshuaj muaj pes tsawg leeg

LR DH46 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH46	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 DH50 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH 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

Mechanical Property

LR DH46 ntxiv cov khoom muaj zog
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH46	mm	Min Mpa	Mpa	Tsawg%	-20	J	J
	t Tsawg dua lossis sib npaug li 50	460	570-720	19%		31	46
	50＜t Tsawg dua lossis sib npaug rau 70	460	570-720	19%		31	46
	70＜t Tsawg dua lossis sib npaug rau 100	460	570-720	19%		31	46
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR DH50 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH 50	mm	Min Mpa	Mpa	Tsawg%	-20	J	J
	t Tsawg dua lossis sib npaug li 50	500	610-770	18%		33	50
	50＜t Tsawg dua lossis sib npaug rau 70	500	610-770	18%		33	50
	70＜t Tsawg dua lossis sib npaug rau 100	500	610-770	18%		33	50
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

Qib sib npaug steel

Sib npaug steel qib ntawm LR DH46
DNV	GL	ABS	BV	CCS	NK	KR	RINA
NV D460	GL -D460	AB/DQ 47	BV/D460	CCS/D460	K D47	R D47	TSI/D460

Sib npaug steel qib ntawm LR / DH50
DNV	GL	ABS	BV	CCS	NK	KR	RINA
NV D500	GL -D500	AB/DQ 51	BV/D500	CCS/D500	K D51	R D51	RI/D 500