KR E36 Steel Plate
Products Description Niobium (Nb) Element Grain - Boundary Strengthening and Corrosion Resistance : In KR F36 steel, niobium mainly improves the corrosion resistance by strengthening the grain boundaries. It can form compounds with carbon and nitrogen in the steel and precipitate at the grain...
Beskrivelse
Grain - Boundary Strengthening and Corrosion Resistance: In KR F36 steel, niobium mainly improves the corrosion resistance by strengthening the grain boundaries. It can form compounds with carbon and nitrogen in the steel and precipitate at the grain boundaries, preventing the migration and growth of the grain boundaries. In the marine environment, stable grain boundaries are crucial for corrosion resistance. Because the movement and growth of grain boundaries may lead to an increase in grain - boundary defects, which become the preferred channels for corrosion. The presence of niobium element can effectively suppress this situation and enhance the corrosion resistance of the steel in the seawater environment.
: Niobium can also promote the uniform corrosion of steel during the corrosion process. In the absence of niobium element or with insufficient niobium content, the steel may experience aggravated local corrosion. The niobium element can make the corrosion process more evenly distributed on the surface of the steel, avoiding the rapid development of local corrosion that leads to a decline in the overall performance of the steel. This is very beneficial for the long - term use of KR F36 steel in the marine environment.
|
C |
P |
S |
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12Cr2Mo1R(H) |
Less than or equal to 0.15 |
Less than or equal to 0.15 |
0.30-0.60 |
Less than or equal to 0.010 |
Less than or equal to 0.010 |
2.0-2.5 |
Less than or equal to 0.20 |
0.90-1.10 |
Less than or equal to 0.20 |
Less than or equal to 0.016 |
Less than or equal to 0.003 |
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The copper element can form a copper - containing corrosion product film on the steel surface. In the marine environment, this film has a certain stability and protectiveness. It can prevent or slow down the diffusion of seawater and oxygen into the interior of the steel, thus reducing the corrosion rate.
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