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Difference between P690QL1 and P690QL2 steel plate

Posted:2022-01-20 11:32:37

The difference between P690QL1 and P690QL2 steel plate is that the impact temperature is different. The impact temperature of the P690QL1 steel plate is -40℃, and the P690QL2 steel plate is -60℃. It is a fine-grained steel that can be quenched and tempered. The size, shape and allowable deviation of the steel plate shall meet the requirements of 2007+A1:2009 in EN10028-1. P690QL2 steel plate is steel for pressure equipment, with good plasticity, toughness, cold bending performance and welding performance.

Chemical composition and melting analysis of P690QL1 and P690QL2 steel plate:

C

Si

Mn

P

S

Ni

Cr

Mo

Cu

Nb

V

Ti

N

Zr

B

≤0.2

≤0.8

≤1.7

≤0.02

≤0.010

≤2.5

≤1.5

≤0.7

≤0.3

≤0.06

≤0.12

≤0.05

≤0.015

≤0.15

≤0.005

Composition Notes: The proportion of grain refining elements should be at least 0.015. Aluminum is also included in these elements, Als≥0.015, Alt≥0.018.

Mechanical properties of P690QL1 steel plate:

Delivery Status	Thickness (mm)	Mechanical properties
Quenching and tempering	<5	ReH(MPa)	≥690
		Rm(MPa)	770-940
		A(%)	≥14
	5-50	ReH(MPa)	≥690
		Rm(MPa)	770-940
		A(%)	≥14
		Impact temperature	-40
		Akv(J)	≥27
	>50-100	ReH(MPa)	≥670
		Rm(MPa)	770-940
		A(%)	≥14
		Impact temperature	-40
		Akv(J)	≥27
	>100-150	ReH(MPa)	≥630
		Rm(MPa)	720-900
		A(%)	≥14
		Impact temperature	-40
		Akv(J)	≥27

Mechanical properties of P690QL2 steel plate:

Delivery Status	Thickness (mm)	Mechanical properties
Quenching and tempering	<5	ReH(MPa)	≥690
		Rm(MPa)	770-940
		A(%)	≥14
	5-50	ReH(MPa)	≥690
		Rm(MPa)	770-940
		A(%)	≥14
		Impact temperature	-60
		Akv(J)	≥27
	>50-100	ReH(MPa)	≥670
		Rm(MPa)	770-940
		A(%)	≥14
		Impact temperature	-60
		Akv(J)	≥27
	>100-150	ReH(MPa)	≥630
		Rm(MPa)	720-900
		A(%)	≥14
		Impact temperature	-60
		Akv(J)	≥27