Japanese standard JIS G3106 SM570 steel plate

SM570 steel plate is the grade in the Japanese standard JIS G3106 rolled steel for welded structures. It is a low-alloy high-strength steel. Its strength grade is the highest in JIS G3106 standard and the grade of Japanese industrial standard. It is a hot-rolled low-alloy high-strength plate with high strengthσb of 570Mpa.

Melting analysis of chemical composition of SM570 steel plate:

Grade	Thickness	C	Si	Mn	P	S
SM570	≤100mm	≤0.18	≤0.55	≤1.70	≤0.035	≤0.035

Mechanical properties of SM570 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
SM570	≥460	≥450	≥430	≥420	570-720	≤16	≥19
						>16	≥26
						>20	≥20

Heat treatment process of SM570 steel plate: hot rolling, normalizing, quenching + tempering or tempering.

Application of SM570 steel plate:
SM570 steel plate is widely used in construction machinery, bridges, containers, vehicles, ships, power equipment and other structural parts. SM570 steel not only has high strength, but also has high low temperature impact toughness.