Japanese standard low-alloy high-strength SM520B steel plate

SM520B steel plate is a low-alloy high-strength steel plate produced in accordance with the Japanese standard JIS G3106. It is a grade of Japanese Industrial Standards. S stands for steel, 520 is the lower limit tensile strength of 520MPa, and B is steel plate grade, impacted at 20℃. SM520B steel plate executive standard: JIS G3106.

Chemical composition of SM520B steel plate:

Grade	Thickness	C	Si	Mn	P	S
SM520B	≤100mm	≤0.20	≤0.55	≤1.65	≤0.035	≤0.035

Mechanical properties of SM520B 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
SM520B	≥365	≥355	≥335	≥325	520-640	≤5	≥19
						5<t≤16	≥15
						5<t≤50	≥19
						>40	≥21

SM520B steel plate heat treatment:
If required, the steel can be normalized, quenched and tempered or tempered heat treatment. In addition, according to the agreement between the supplier and the demander, heat treatment such as controlled rolling and controlled cooling can also be carried out.

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