Q355NHB weathering steel: Excellent performance, widely used

Q355NHB weathering steel concept

Q355NHB weathering steel is an atmospheric corrosion resistant steel plate, also known as weathering steel, is a low alloy series between ordinary steel and stainless steel. Among them, "Q" represents the yield strength, "355" indicates that the lower yield strength of the steel is not less than 355MPa, "NH" is the pinyin abbreviation of weather resistance, and "B" represents the level of the steel plate.

Q355NHB weathering steel features

High strength: The yield strength of Q355NHB weathering steel is not less than 325MPa, and it has a high carrying capacity.

Good weather resistance: By adding a small amount of alloying elements, such as copper, chromium, nickel, etc., the steel improves its atmospheric corrosion resistance and reduces the structural damage caused by corrosion.

Excellent welding performance: Q355NHB weathering steel has good welding performance, easy to carry out various welding operations in the project, to ensure the integrity and stability of the structure.

Excellent mechanical properties: The steel has a series of advantages such as toughness, plastic extension, forming, etc., suitable for a variety of complex processing and forming processes.

Energy saving and environmental protection: Because Q355NHB weathering steel has the characteristics of rust resistance, corrosion resistance and life extension, thinning and consumption reduction, so the use of materials and energy consumption are reduced to a certain extent, which is conducive to environmental protection and sustainable development.

Q355NHB weathering tempering chemical composition

The main chemical components of Q355NHB weathering steel include carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), copper (Cu), chromium (Cr) and nickel (Ni). The content of these elements fluctuates within a certain range to ensure that the steel has excellent properties. Specifically, the content range of its chemical components is roughly as follows:

Carbon (C) : ≤0.16%

Silicon (Si) : ≤0.50%

Manganese (Mn) : 0.50%~1.00%

Phosphorus (P) : ≤0.030%

Sulfur (S) : ≤0.030%

Copper (Cu) : 0.25%~0.55%

Chromium (Cr) : 0.40%~0.80%

Nickel (Ni) : ≤0.65%

Q355NHB weathering steel application range

Q355NHB weathering steel is widely used in various fields because of its excellent performance characteristics:

Bridge engineering: Used to manufacture load-bearing structures and connecting components of Bridges that withstand the load of vehicles and pedestrians while resisting wind and rain erosion.

Construction engineering: used to manufacture structural parts and decorative parts of buildings, such as steel structure frames, curtain walls, etc., to improve the overall performance and beauty of the building.

Vehicle manufacturing: Used to manufacture the bodies and components of vehicles such as cars and trains to improve the durability and safety of vehicles.

Ship manufacturing: Used to manufacture hull structural parts and decks and other components, withstand the erosion of waves and salt spray, to ensure the safety of navigation of the ship.

Tower and photovoltaic engineering: used to manufacture power towers, communication towers and photovoltaic brackets and other structural parts, to withstand the erosion of natural environments such as wind, rain and sunlight.