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Basic information of S620Q high-strength steel plate

Posted:2021-10-21 17:13:27

1. S620Q high-strength steel plate executive standard: EN10025-6. It is rarely used by domestic industrial enterprises. The corresponding national GB standards for such low-alloy high-strength steel plates are Q620D low-alloy high-strength steel and Q620E low-alloy high-strength steel.

2. Implementation of flaw detection standards; China (JB4730 GB/T2970), the United States (A435, A577, A578), Japan (JISGo801, JISG0901), Germany SEL072, and the United Kingdom. According to the specific requirements of customers: high-temperature drawing of the steel plate, simulation of post-weld heat treatment and control of element content and other performance control of the steel plate. Similar low-alloy high-strength grade materials are: S590Q, S690Q, S690QL, S690QL1, Q690D, Q550D, Q590D, etc.

3. The chemical composition and mechanical properties of S620Q high-strength steel plate:

Grade		Chemical composition % MAX
		C	Si	Mn	P	S	B	Cr	Cu	Mo	Nb	Ni	Ti
S620Q		0.22	0.86	1.8	0.03	0.017	0.006	1.6	0.55	0.74	0.07	2.1	0.07
		Mechanical properties MIN
		Yield strength (Mpa)			Tensile strength (Mpa)				Elongation %
	TH(MM)	>3≤50	>50≤100	>100≤150	>3 ≤50	>50≤100	>100≤150		15
		620	580	560	700-890		650-830

4. The use of S620Q high-strength steel plate:
S620Q steel plate is used to manufacture low-temperature resistant, high-strength key components, construction machinery, mining machinery structures, etc. It is a high-strength structural steel plate.