Difference between LR DH62 and LR EH62 steel plate

Jan 26, 2026 Leave a message

LR DH62 and LR EH62 are both high-strength, Lloyds Register (LR) certified shipbuilding steel grades with the same yield strength 620 MPa, tensile strength 720-890 MPa, and chemical composition. The primary difference is their notch toughness: EH62 is tested at lower temperatures -40° C compared to DH62 -20° C, making EH62 better suited for arctic conditions.

Chemical Composition

LR DH62 extra high Strength Chemical Composition
Grade	The Element Max (%)
Grade	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 EH62 extra high Strength Chemical Composition
Grade	The Element Max (%)
Grade	C	Si	Mn	P	S	Al	N
LR EH62	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 extra high strength property
Grade		Mechanical Property			Charpy V Impact Test
Grade	Thickness	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
LR DH62	mm	Min Mpa	Mpa	Min %	-20	J	J
	t≤50	620	720-890	17%		41	62
	50＜t≤70	620	720-890	17%		41	62
	70＜t≤100	620	720-890	17%		41	62
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

LR EH62 extra high strength property
Grade		Mechanical Property			Charpy V Impact Test
Grade	Thickness	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
LR EH62	mm	Min Mpa	Mpa	Min %	-40	J	J
	t≤50	620	720-890	17%		41	62
	50＜t≤70	620	720-890	17%		41	62
	70＜t≤100	620	720-890	17%		41	62
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

Key Differences and Similarities:

Grade Significance (Toughness):

LR DH62: "D" signifies Charpy V-Notch impact testing at -20° C.

LR EH62: "E" signifies Charpy V-Notch impact testing at -40° C.

Strength: Both have a minimum yield strength of 620 MPa and a tensile strength range of 720-890 MPa.

Application: Both are used for heavy-duty ship structures, but EH62 is required for colder, more extreme environments.