S960QL steel plate composition and properties

1. Introduction to S960QL steel plate:
S960QL is a European standard special alloy structural steel, which belongs to quenched and tempered structural steel with high yield strength. S indicates structural steel, 960 is the yield value, unit MPa, Q indicates delivery conditions, L indicates the smaller value specified by impact energy when the temperature is not lower than - 50℃, and S960QL steel plate is the material in European standard EN 10025-6.

2. Heat treatment of S960QL steel plate: quenching and tempering (Q + T).

3. Chemical composition and melting analysis of S960QL steel plate:

C

Si

Mn

P

S

Ni

Cr

Mo

Cu

Nb

V

Ti

N

Zr

B

Ceq Max

≤0.2

≤0.8

≤1.7

≤0.02

≤0.010

≤2

≤1.5

≤0.7

≤0.5

≤0.06

≤0.12

≤0.05

≤0.015

≤0.15

≤0.005

≤0.82

4. Mechanical properties of S960QL steel plate:

Grade	Heat treatment	Thickness	Mechanical properties
S960QL	QT	3-50mm	ReH(MPa)	≥960
			Rm(MPa)	980-1150
			A(%)	≥10
			Impact temperature	-40
			Akv(J)	≥30

5. S960QL steel plate production process:
Converter / electric furnace steelmaking → LF furnace refining → VD furnace vacuum degassing → continuous casting / mold casting / electroslag → finishing and heating → rolling → flaw detection → heat treatment → steel plate finishing → sampling → inspection.