How to repair corrosion pits on 1.8904 EN 10025-6 high strength steel

The company specializes in the research and development, production and sales of 1.8904 EN 10025-6 high strength steel seamless pipes, longitudinally welded pipes, large-diameter welded pipes, API 5L welded pipes, spiral welded pipes, and large-diameter thick-walled straight seam steel pipes. The company has 1.8904 EN 10025-6 high strength steel five production lines in three major production workshops: large-diameter longitudinally welded pipe production workshop,1.8904 EN 10025-6 high strength steel rolled steel pipe production workshop, and thermally expanded steel pipe production workshop, with an annual production capacity of more than 100,000 tons.

Composition characteristics of 1.8904 EN 10025-6 high strength steel product: (1) Low carbon: Due to high requirements for toughness, weldability and cold formability, its carbon content does not exceed 0.20%. 2) Add manganese-based alloying elements. 3) Adding auxiliary elements such as niobium, titanium or vanadium: a small amount of niobium, titanium or vanadium forms fine carbides or carbonitrides in the steel, which is beneficial to obtain fine ferrite grains and improve the strength and toughness of the steel.

The yield point of the steel structure determines the stress that the structure can withstand without permanent deformation. The minimum yield point of typical carbon structural steel is 235MPa. The minimum yield point of typical low-alloy high-strength steel is 345MPa. Therefore, according to the proportional relationship of its yield point, the use of low-alloy high-strength steel allows the stress to be 1.4 times higher than that of carbon structural steel. Compared with 1.8904 EN 10025-6 high strength steel, carbon structural steel, the use of low-alloy high-strength steel can reduce the size of structural parts and reduce weight.

1.8904 EN 10025-6 high strength steel, ASTM A302 Grade B/A302 Gr.B vessel plates boiler steel sheets are manganese-molybdeum-nickel alloy steel plates, which are widely used in petroleum, chemical industry, power station, boiler, etc, to make the reactor, heat exchanger, separator, spherical tank, liquefied gas, nuclear reactor pressure vessel, boiler steam drum steam, liquefied petroleum, hydropower station and so on.

A204 Grade A steel chemical composition(%)Carbon: 0.18-0.25 Manganese max.: 0.90Phosphorus Max.: 0.025Sulfur Max.: 0.025Silicon: 0.15-0.40Molybdenum: 0.45–0.601.8904 EN 10025-6 high strength steel, A204 Grade A steel mechanical propertiesTensile strength, kis [MPa]: 265-85 [450-585]Yield strength, min, kis [MPa]: 37 [255]Elongation in 8 in. [200 mm], min, %: 19Elongation in 2 in. [50 mm], min, %: 23

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