Properties and application of S550Q steel plate

Specific specifications of S550Q steel plate: thickness: 8-280mm, width: 1600-4020mm, length: 6000-17500mm. S550Q plate is commonly used in the construction of hydropower stations and the manufacture of hydraulic turbines.

Delivery status of S550Q steel plate: S550Q steel plate is delivered in the state of quenching + tempering. It is also allowed to add flaw detection specification requirements, flaw detection grade requirements, Z-direction functional requirements, and requirements for adding special alloy elements according to the needs, but it is required to be communicated between the supplier and the buyer and noted in the contract.

Chemical composition of S550Q steel plate (melting analysis):
C: ≤0.22, Si: ≤0.86, Mn: ≤1.80, P: ≤0.030, S: ≤0.017, N: ≤0.016
Cu: ≤0.55, Mo: ≤0.74, Cr: ≤1.60, V: ≤0.14, Nb: ≤0.07, Ti: ≤0.07
B: ≤0.006, Ni: ≤2.10

Mechanical function of S550Q steel plate:
Yield strength 550
Tensile strength 640-820
Elongation% 16
Impact energy at -20℃ 30
Impact energy at 0℃ 40

S550Q steel plate is a water and electricity steel plate, belonging to low alloy high-strength steel plate, and also a quenched and tempered high-strength steel plate. It has the characteristics of high yield strength and more strengthening alloy elements. Of course, if the purchaser needs the steel plate with thickness direction function, he can also add a symbol representing the thickness direction, that is, the Z direction function level, after the above specified grade, such as S550Q-Z15, S550Q-Z25, S550Q-Z35.