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Q550F steel plate for high-strength structure

Posted:2021-12-25 09:07:05

Melting analysis of chemical composition of Q550F steel plate:

Grade	C	Si	Mn	P	S	Ni
Q550F	≤0.2	≤0.8	≤1.7	≤0.02	≤0.010	≤2
Cr	Mo	Cu	Nb	V	Ti	B
≤1.5	≤0.7	≤0.5	≤0.06	≤0.12	≤0.05	≤0.005

Composition Remarks: At least one grain refinement element of Nb, Ti, V, Al is added to the steel, and the minimum amount of at least one element is 0.015 (Als for Al). Alt can be used instead of Als, in this case Alt ≥ 0.018. Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15

Mechanical properties of Q550F steel plate:

Thickness	Mechanical properties
≤50mm	ReH(MPa)	≥550	When the yield is not obvious, use Rp0.2
	Rm(MPa)	640-820
	A(%)	≥16
	Impact temperature	-60
	Akv(J)	≥34	Longitudinal
>50-100mm	ReH(MPa)	≥530	When the yield is not obvious, use Rp0.2
	Rm(MPa)	640-820
	A(%)	≥16
	Impact temperature	-60
	Akv(J)	≥34	Longitudinal
>100-150mm	ReH(MPa)	≥490	When the yield is not obvious, use Rp0.2
	Rm(MPa)	590-770
	A(%)	≥16
	Impact temperature	-60
	Akv(J)	≥34	Longitudinal

Q550F steel plate executive standard: GB/T 16270.

Q550F steel plate delivery status: quenching + tempering.

Q550F steel plate application range:
Q550F quenched and tempered steel plate for high-strength structure, used to manufacture steel structural parts such as coal mine hydraulic supports, heavy vehicles, construction machinery, and wear-resistant structures that require good weldability.