Difference between LR EH69 and LR EH62 steel plate

Jan 06, 2026 Leave a message

The main difference is strength: LR EH69 is a higher-strength shipbuilding steel than LR EH62 (or DH62), with EH69 offering significantly higher minimum tensile strength (around 690 MPa) and yield strength, making it suitable for high-stress areas like large ship hulls and offshore structures, while EH62 provides good general strength for less demanding parts.

Chemical Composition

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

LR EH69 extra high Strength Chemical Composition
Grade	The Element Max (%)
Grade	C	Si	Mn	P	S	Al	N
LR EH69	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 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

LR EH69 extra high strength property
Grade		Mechanical Property			Charpy V Impact Test
Grade	Thickness	Yield	Tensile	Elongation	Degree	Energy 1	Energy 2
LR EH69	mm	Min Mpa	Mpa	Min %	-40	J	J
	t≤50	690	770-940	16%		46	69
	50＜t≤70	690	770-940	16%		46	69
	70＜t≤100	690	770-940	16%		46	69
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

Key Differences Explained:

Grade Designation: In Lloyd's Register (LR) (LR) steel grades for shipbuilding, the letter (E, D, C, B, A) indicates the impact toughness level (EH being the highest), and the number (69, 62, etc.) signifies the minimum yield strength in Megapascals (MPa).

Strength:

LR EH69: Minimum Tensile Strength ~690 MPa, Higher Yield Strength.

LR EH62: Lower minimum tensile strength and yield strength compared to EH69, but still considered high-strength.

Application:

EH69: Used for critical, high-stress components, such as large ship superstructures or heavy-duty offshore equipment.

EH62: Suitable for general structural parts in ships and marine structures where strength requirements are high but not as extreme as for EH69.