NK FQ70 and NK F70 are high-strength steel plates specifically designed for marine applications. These grades of steel are renowned for their exceptional mechanical properties and chemical composition, making them ideal for use in the construction of ships and offshore structures.

In terms of chemical composition, NK FQ70 and NK F70 steels contain precise percentages of carbon, silicon, manganese, phosphorus, sulfur, chromium, nickel, molybdenum, copper, nitrogen, vanadium, titanium, aluminum, and boron. This balanced composition ensures high strength, good weldability, and corrosion resistance, crucial factors in marine environments.

The mechanical properties of these steel grades are equally impressive. NK FQ70 and NK F70 exhibit high tensile strength and yield strength, making them capable of withstanding significant loads and pressures. Additionally, their good toughness and ductility allow them to absorb impact energy without fracturing, ensuring the structural integrity of ships and offshore structures.

When it comes to heat treatment, NK FQ70 and NK F70 steel plates are typically quenched and tempered to achieve the desired mechanical properties. This process involves heating the steel to a high temperature, followed by rapid cooling (quenching) and then reheating to a lower temperature for tempering. This treatment improves the steel's hardness, strength, and resistance to wear and corrosion.

Regarding dimensions, NK FQ70 and NK F70 steel plates are available in a range of thicknesses, widths, and lengths to suit various applications. These plates can be cut and shaped to precise specifications, ensuring a perfect fit for each project.

Impact testing is an essential part of the quality control process for NK FQ70 and NK F70 steel plates. This testing involves subjecting the steel to low-temperature impact loads to assess its resistance to brittle fracture. The steel grades must meet strict impact toughness requirements to ensure their reliability in extreme conditions.

The primary application areas for NK FQ70 and NK F70 steel plates include the construction of ships, offshore platforms, and other marine structures. These steel grades are particularly suitable for use in hulls, decks, and other critical components that require high strength and corrosion resistance.

TJC Steel, a leading supplier of marine steel plates, offers a comprehensive range of NK FQ70 and NK F70 steel plates. The company's supply cases demonstrate the widespread use of these steel grades in various marine projects. From large ocean-going vessels to smaller inland waterway crafts, TJC Steel has provided high-quality steel plates that meet the rigorous standards of the marine industry.

In conclusion, NK FQ70 and NK F70 steel plates are essential materials for marine construction, offering exceptional strength, toughness, and corrosion resistance. Their precise chemical composition, optimized mechanical properties, and reliable heat treatment ensure their reliability in even the most challenging marine environments. TJC Steel's extensive supply cases further demonstrate the versatility and popularity of these steel grades in the marine industry.