Smelting composition and mechanical properties of P690Q steel plate

Posted:2021-08-25 09:42:39

P690Q steel plate

P690Q steel plate is a weldable fine grain quenched and tempered steel. P690Q steel plate meets the standard: EN10028-6, material number: 1.8879.

Chemical composition and melting analysis of P690Q steel plate:

≤0.2

≤0.8

≤1.7

≤0.025

≤0.015

≤2.5

≤1.5

≤0.7

≤0.3

≤0.06

≤0.12

≤0.05

≤0.015

≤0.15

≤0.005

Composition note: the share of grain refining elements shall be at least 0.015, and aluminum shall also be included in these elements, Als ≥ 0.015, Alt ≥ 0.018.

Mechanical properties of P690Q steel plate:

Grade	Heat treatment	Thickness	Mechanical properties
P690Q	Quenching + Tempering	<5mm	ReH(MPa)	≥690
			Rm(MPa)	770-940
			A(%)	≥14
P690Q		5-50mm	ReH(MPa)	≥690
			Rm(MPa)	770-940
			A(%)	≥14
			Impact temperature	-20
			Akv(J)	≥27
P690Q		>50-100mm	ReH(MPa)	≥670
			Rm(MPa)	770-940
			A(%)	≥14
			Impact temperature	-20
			Akv(J)	≥27
P690Q		>100-150mm	ReH(MPa)	≥630
			Rm(MPa)	720-900
			A(%)	≥14
			Impact temperature	-20
			Akv(J)	≥27

P690Q steel plate has outstanding plasticity, resistance, cold bending performance and welding performance.

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