Q890C steel plate composition and mechanical properties

Q890C steel plate technical standard: GB/T 16270 quenched and tempered steel plate for high-strength structure.

Q890C steel plate material category: low-alloy high-strength steel.

Q890C steel plate description: This product is a high-strength structural steel plate with a thickness of ≤150mm and delivered in a quenched and tempered state.

Q890C steel plate chemical composition and melting analysis:

Grade	C	Si	Mn	P	S	Ni
Q890C	≤0.2	≤0.8	≤2	≤0.025	≤0.015	≤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 Q890C steel plate:

Thickness	Mechanical properties
≤50mm	ReH(MPa)	≥890	When the yield is not obvious, use Rp0.2
	Rm(MPa)	940-1100
	A(%)	≥11
	Impact temperature	0
	Akv(J)	≥34	Longitudinal
>50-100mm	ReH(MPa)	≥830	When the yield is not obvious, use Rp0.2
	Rm(MPa)	880-1100
	A(%)	≥11
	Impact temperature	0
	Akv(J)	≥34	Longitudinal

Technical specification for Q890C steel plate:
The size, shape, weight and allowable deviation of the steel plate should meet the requirements of the GB/T 709 standard.
The thickness deviation is implemented according to GB/T709 category B or C, and should be noted.
The surface quality of the Q890C steel plate meets the requirements of GB3274.

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