Qhov sib txawv ntawm LR DH62 thiab LR DH69 steel phaj

Dec 19, 2025 Tso lus

Qhov sib txawv tseem ceeb ntawm LR DH62 thiab LR DH69 yog lawv qib zog, nrog qib '69' muab cov txiaj ntsig siab dua thiab lub zog tensile (nyob ib ncig ntawm 450 MPa tawm los) piv rau qib '62' (ib puag ncig 355 MPa yield), ob qho tib si yog Lloyds Register (LR) certified steel 'building high ships rau cov ntawv siv txias dua, tab sis '69' txhais tau tias muaj zog dua thiab lub zog rau kev xav tau ntau yam kev siv xws li decks, hulls, thiab cov khoom loj.

Tshuaj muaj pes tsawg leeg

LR DH62 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH62	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 DH69 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH69	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 DH62 ntxiv cov khoom muaj zog
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH62	mm	Min Mpa	Mpa	Tsawg%	-20	J	J
	t Tsawg dua lossis sib npaug li 50	620	720-890	17%		41	62
	50＜t Tsawg dua lossis sib npaug rau 70	620	720-890	17%		41	62
	70＜t Tsawg dua lossis sib npaug rau 100	620	720-890	17%		41	62
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR DH69 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH69	mm	Min Mpa	Mpa	Tsawg%	-20	J	J
	t Tsawg dua lossis sib npaug li 50	690	770-940	16%		46	69
	50＜t Tsawg dua lossis sib npaug rau 70	690	770-940	16%		46	69
	70＜t Tsawg dua lossis sib npaug rau 100	690	770-940	16%		46	69
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

Qhov tseem ceeb Distinctions:

Lub zog: 690 qib (DH69) muaj zog dua thiab tawv dua 620 qib (DH62).

Daim Ntawv Thov: DH69 yog siv rau hnyav dua, cov qauv tseem ceeb dua, thaum DH62 yog rau cov khoom siv dav dav.

Cov Khoom Siv Code: 'LR' txhais tau tias Lloyd's Register tau lees paub, 'D' txhais tau tias Siab Tensile, 'H' txhais tau tias muaj zog dua, thiab tus lej (62/69) qhia qhov tsawg kawg nkaus lub zog hauv kg / mm².

Hauv cov ntsiab lus yooj yim: Xav txog nws zoo li qhov hnyav sib txawv ntawm txoj hlua; ob qho tib si muaj zog (DH), tab sis DH69 zoo li ib txoj hlua tuab dua, hnyav dua rau cov khoom loj dua, thaum DH62 yog rau cov hauj lwm sib zog los yog cov qauv.