Qhov sib txawv ntawm LR DH69 thiab LR EH69 steel phaj

Jan 26, 2026 Tso lus

LR DH69 thiab LR EH69 yog ob qho tib si ntxiv - siab - lub zog shipbuilding steel qib tau ntawv pov thawj los ntawm Lloyd's Register (LR) nrog qhov tsawg kawg nkaus lub zog ntawm 690 MPa. Qhov sib txawv tseem ceeb yog lawv cov kev cuam tshuam toughness: DH69 yog kuaj ntawm -20℃C, whereas EH69 muaj superior low-temperature toughness, kuaj ntawm -40℃C.

Tshuaj muaj pes tsawg leeg

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

LR EH69 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR EH 69	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 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

LR EH69 muaj zog muaj zog ntxiv
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR EH 69	mm	Min Mpa	Mpa	Tsawg%	-40	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 txawv tseem ceeb

LR DH69 vs. LR EH69 Impact Toughness Kub:

LR DH69: Charpy V-Kev ntsuas qhov cuam tshuam tau ua tiav ntawm -20℃C.

LR EH69: Charpy V-Kev ntsuam xyuas qhov cuam tshuam tau ua tiav ntawm -40℃C, qhia tau tias kev ua tau zoo tshaj hauv qhov chaw txias dua.

Kev Siv Ib puag ncig:

DH69: Haum rau kev siv cov qauv hauv qhov chaw txias.

EH69: Tsim los rau huab cua txias, xws li polar- cov nkoj hauv cheeb tsam thiab cov ntawv thov arctic, qhov yuav tsum muaj kev tiv thaiv ntau dua rau kev tawg tawg.