The chemical composition of Q235NH weather-resistant steel plate mainly includes elements such as carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni) and copper (Cu). Specifically, its chemical composition ranges roughly as follows:
The content of carbon (C) should be less than or equal to 0.13%.
The content of silicon (Si) ranges from 0.10% to 0.40%.
The content of manganese (Mn) should be between 0.20% and 0.60%.
The contents of phosphorus (P) and sulfur (S) should both be less than or equal to 0.030%.
The content of chromium (Cr) is between 0.40% and 0.80%.
The content of nickel (Ni) should be less than or equal to 0.65%.
Copper (Cu) content ranges from 0.25% to 0.55%.
Q235NH high-strength weathering steel is widely used in many fields because of its excellent weathering resistance, high strength and good processability.
In the construction field, Q235NH high-strength weathering steel is often used in outdoor steel structures, bridges, highway guardrails, building exterior wall panels, etc. Its weather resistance enables it to maintain stable performance for a long time in harsh environments. At the same time, its high strength and good workability also meet the requirements for material strength and aesthetics in architectural design.
In the field of vehicles, Q235NH high-strength weathering steel is widely used in the manufacture of vehicles, trains, ships and other transportation vehicles. It resists corrosion and wear in harsh environments, ensuring the safety and service life of vehicles and ships.
In addition, Q235NH high-strength weathering steel is also commonly used in containers, power plant chimneys, railway engineering and other outdoor steel, such as steel for large outdoor sculptures. Because its weather resistance is 2 to 8 times that of ordinary carbon steel, and its paintability is 1.5 to 10 times that of ordinary carbon steel, it can be used in thinner, exposed or simplified coating applications, which brings significant benefits to component manufacturers and users. benefits.
In addition to the above fields, Q235NH high-strength weathering steel can also be used in other fields such as petroleum, chemical industry, and electric power. Its excellent weather resistance and wide range of applications make it important in many engineering fields.