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Japanese standard SM490YA SM490YB steel plate

Posted:2022-01-10 13:27:04

Introduction of SM490YA, SM490YB Japanese standard steel plate
SM490YA, SM490YB Japanese standard welded structural steel is a kind of structural steel produced according to Japanese standard JIS G3106, the strength σb is 490MPa, A and B are the quality grades of steel plates, A grade does not do impact, B grade needs 20℃ impact, It is used for structures, bridges, ships, vehicles, construction machinery and other structural parts that require excellent welding performance, and generally welded containers.

SM490YA, SM490YB steel plate implementation standard: JISG 3106-2004.

Chemical composition and melting analysis of SM490YA and SM490YB steel plates:

Grade	Thickness	C	Si	Mn	P	S
SM490YA	≤100mm	≤0.20	≤0.55	≤1.65	≤0.035	≤0.035

Mechanical properties of SM490YA steel plate:

Grade	Yield point or yield strength, N/m㎡				Tensile strength		Elongation
	Thickness mm				Thickness mm		Thickness mm	%
	≤16	16<t≤40	40<t≤75	75<t≤100	≤100	100<t≤200
SM490YA	≥365	≥355	≥335	≥325	490-610	-	≤5	≥19
							5<t≤16	≥15
							5<t≤50	≥19
							>40	≥21

Mechanical properties of SM490YB steel plate

Grade	Yield point or yield strength, N/m㎡				Tensile strength		Elongation
	Thickness mm				Thickness mm		Thickness mm	%
	≤16	16<t≤40	40<t≤75	75<t≤100	≤100	100<t≤200
SM490YB	≥365	≥355	≥335	≥325	490-610	-	≤5	≥19
							5<t≤16	≥15
							5<t≤50	≥19
							>40	≥21

Delivery status of SM490YA and SM490YB steel plates: hot rolled, normalized, quenched + tempered or tempered.