LR Grade AH40 Shipbuilding Steel Plate Equivalent Steel Grade

LR (Lloyd’s Register) rule has normal strength, high strength and extra high strength steel plate for shipbuilding, onshore/offshore platform and other marine engineering. LR AH40 Shipbuilding steel plates are mainly used for making the offshore oil drilling platform, the hull of ship building and ship repairing.

Chemical Composition of LR/AH40 high strength

Grade	The Element Max (%)
	C	Si	Mn	P	S	Al	N
LR/AH40	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

Mechanical Property of LR/AH40 high strength

Grade	Thickness	Yield Strength	Tensile Strength	Elongation	Charpy V Notch Impact Test
					Degree	Value 1	Value 2
LR/AH40	mm	Min Mpa	Mpa	Min %	0	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
Note: Value 1 is transverse impact test, Value 2 is longitudinal

Equivalent steel grade of LR/AH40

DNV	GL	ABS	BV	CCS	NK	KR	RINA
NV A40	GL-A40	AB/AH40	BV/AH40	CCS/A40	K A40	R A40	RI/A40

Grade AH40 Shipbuilding Steel Plate Specification

SteelAdoptStandard:LloydsRegister(LR)
Thickness-6~700mm;
Width-1500~4020mm;
Length-3000~27000mm
Besides ,the size can be customized.

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