Hydropower steel S550Q-Z35 composition and properties

S550Q-Z35 steel plate is a kind of hydropower steel plate, which belongs to low alloy high strength steel plate and is European standard steel plate. Hydropower steel S550Q-Z35 has the characteristics of high yield and more strengthening alloy elements.

Due to the particularity of the service environment of water and electricity steel, the requirements of strength, toughness, weldability and corrosion resistance of S550Q-Z35 steel plate are very strict. Hydropower steel S550Q-Z35 plate has high mechanical properties, weldability and Z-direction properties.

Chemical composition (melting analysis) of hydropower steel S550Q-Z35 plate:
C: ≤0.22，Si: ≤0.86， P: ≤0.030， S: ≤0.017，N: ≤0.0060， Cu: ≤0.55， Mo: ≤0.74，Cr: ≤1.60， V: ≤0.14， Nb: ≤0.07， Ti: ≤0.07， B: ≤0.0060， Ni: ≤2.10.

The mechanical properties of S550Q-Z35 steel plate are as follows:
Yield strength: 550 Mpa, tensile strength: 640-820 Mpa, elongation: 16%, - 20℃ impact energy: 30J, 0℃ impact energy: 40J.

Hydropower steel S550Q-Z35 delivery state: quenching and tempering. The requirements of flaw detection standard, flaw detection level, Z-direction performance and special alloy elements can also be added according to the demand, but it needs to be communicated between the supplier and the demander and indicated in the contract.