Dab tsi yog qhov txawv ntawm LR DH40 thiab LR DH42 steel phaj?

Dec 19, 2025 Tso lus

LR DH40 thiab LR DH42 yog qib siab - lub zog, qis- alloy (HSLA) steel daim hlau siv feem ntau hauv kev tsim nkoj, nrog qhov sib txawv tseem ceeb yog lawv lub zog tawm los thiab muaj feem cuam tshuam me ntsis hauv kev sib xyaw thiab cuam tshuam, qhov twg '42' qhia txog qib siab dua 40a (MPa) (kwv yees li 400 MPa), ob qho tib si ntsib Lloyd's Register (LR) specifications rau marine applications.

Tshuaj muaj pes tsawg leeg

LR DH40 siab zog tshuaj muaj pes tsawg leeg
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH 40	0.18	0.05	0.9-1.6	0.035	0.035	0.015
	Nb	V	Ti	Cu	Cr	Ni	Mo
	0.02-0.05	0.03-0.10	0.02	0.35	0.20	0.40	0.08

LR DH42 ntxiv muaj zog Chemical Composition
Qib	Cov ntsiab lus Max (%)
Qib	C	Si	Mn	P	S	Al	N
LR DH42	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 DH40 siab zog khoom
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH 40	mm	Min Mpa	Mpa	Tsawg%	-20	J	J
	t≤50	390	510-650	20%		26	39
	50 t 70	390	510-650	20%		31	46
	70＜t≤100	390	510-650	20%		37	55
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR DH42 ntxiv cov khoom muaj zog
Qib		Mechanical Property			Charpy V Impact Test
Qib	Thickness	Yield	Tensile	Elongation	Qib	Zog 1	Zog 2
LR DH42	mm	Min Mpa	Mpa	Tsawg%	-20	J	J
	t≤50	420	530-680	20%		28	42
	50 t 70	420	530-680	20%		28	42
	70＜t≤100	420	530-680	20%		28	42
Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev

LR: Qhia txog kev ua raws li Lloyd's Register (LR), lub koom haum kev faib tawm loj rau cov qauv dej hiav txwv.

DH: Qhia txog qib tshwj xeeb lub zog rau kev tsim kho lub nkoj, feem ntau txhais tau tias muaj zog tensile siab.

40 vs. 42: Tus lej no yog hais txog qhov tsawg kawg nkaus yield zog hauv megapascals (MPa).

LR DH40: Yam tsawg kawg nkaus tawm lub zog ntawm kwv yees li 400 MPa.

LR DH42: Tsawg tshaj tawm lub zog ntawm kwv yees li 420 MPa.

Hauv cov ntsiab lus: DH42 yog qib hlau muaj zog dua li DH40, muab cov khoom siv kho kom zoo me ntsis, ua rau nws tsim nyog rau thaj chaw uas xav tau lub zog siab dua hauv cov qauv kev tsim nkoj.