Difference between LR EH46 and LR EH50 steel plate

Dec 19, 2025 Lämna ett meddelande

LR EH46 and LR EH50 are both Lloyd's Register (LR) shipbuilding steel grades, with the main difference being their strength level: EH50 offers higher minimum yield strength (500 MPa) and tensile strength (610-770 MPa) compared to EH46 (460 MPa yield, 570-720 MPa tensile), making EH50 a stronger, high-strength steel for more demanding structural applications in ships, while EH46 is a standard high-strength grade.

LR EH46 extra high Strength Chemical Composition

	C			P	S		N
LR EH46	0.20	0.55	1.70	0.030	0.030	0.015	0.020
		V
	0.02-0.05	0.03-0.10	0.02

LR EH50 extra high Strength Chemical Composition

	C			P	S		N
LR EH50	0.20	0.55	1.70	0.030	0.030	0.015	0.020
		V
	0.02-0.05	0.03-0.10	0.02

LR EH46 extra high strength property

						Energy 1	Energy 2
LR EH46					-40	J	J
	t<=50	460	570-720	19%		31	46
	50＜t<=70	460	570-720	19%		31	46
	70＜t<=100	460	570-720	19%		31	46
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

LR EH50 extra high strength property

						Energy 1	Energy 2
LR EH50					-40	J	J
	t<=50	500	610-770	18%		33	50
	50＜t<=70	500	610-770	18%		33	50
	70＜t<=100	500	610-770	18%		33	50
Note: Energy 1 is transverse impact test, Energy 2 is longitudinal

LR Grade EH46:

Yield Strength (min): 460 MPa

Tensile Strength: 570-720 MPa

Elongation (min): 17%

Use: Standard high-strength shipbuilding steel.

LR Grade EH50:

Yield Strength (min): 500 MPa

Tensile Strength: 610-770 MPa

Elongation (min): 16%

In essence: EH50 is the stronger sibling, providing more resistance to deformation (higher yield) and fracture (higher tensile) than EH46, indicated by the higher number in its name (50 vs. 46).