EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1

Description: EN 10025-6 high strength steel plates S550 includes steel grades of S550Q, S550QL and S550QL1. They are quenched and tempered high-strength steel plates. The im...

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EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 Description

EN 10025-6 high strength steel plates S550 includes steel grades of S550Q, S550QL and S550QL1. They are quenched and tempered high-strength steel plates. The impact temperature of S550Q steel is at -20℃, the impact temperature of S550QL steel is at -50℃, and the impact temperature of S550QL1 steel is at -60℃.

EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 chemical composition of heat analysis:

Grade	C	Si	Mn	P	S	N	B	Cr	Cu	Mo	Nb	Ni	Ti	V	Zr
S550Q	0.20	0.80	1.70	0.025	0.015	0.015	0.005	1.50	0.50	0.70	0.06	4.0	0.05	0.12	0.15
S550QL, S550QL1				0.020	0.010

EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 chemical composition of product analysis:

Grade	C	Si	Mn	P	S	N	B	Cr	Cu	Mo	Nb	Ni	Ti	V	Zr
S550Q	0.22	0.86	1.8	0.03	0.017	0.016	0.006	1.6	0.55	0.74	0.07	4.1	0.07	0.14	0.17
S550QL, S550QL1				0.025	0.012

EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 mechanical properties - tensile test properties at room temperature:

EN 10025-6	Steel number	Min. Yield Strength (MPa)				Tensile Strength (MPa)				Min. Elongation
		≥3 ≤50	>50 ≤100	>100 ≤125	>125 ≤200	≥3 ≤50	>50 ≤100	>100 ≤125	>125 ≤200
S550Q	1.8904	550	530	490		640 to 820		590 to 770		16
S550QL	1.8926
S550QL1	1.8986

EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 mechanical properties - impact energy on test pieces:

EN 10025-6	Min. impact energy (J) at test temperature (℃)
Grade	0		-20		-40		-60
Grade	Longitudinal	Transverse	Longitudinal	Transverse	Longitudinal	Transverse	Longitudinal	Transverse
S550Q	40	30	30	27	-	-	-	-
S550QL	50	35	40	30	30	27	-	-
S550QL1	60	40	50	35	40	30	30	27

EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 are usually supplied in quenching and tempering condition. The requirements of flaw detection, Z-direction performance and special alloy elements can also be added, but it should be indicated in the contract.

EN 10025-6 high strength steel plates S550Q, S550QL, S550QL1 are used for manufacturing low temperature and high strength key components, construction machinery, mining machinery structure, etc. They are commonly used in the construction of hydropower stations and in the manufacture of hydraulic turbines.

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