Q355NH steel plate under China GB/T 4171 standard, it is a kind of weathering steel.
Q355NH is a high-strength, low-alloy structural steel that offers excellent corrosion resistance. Its composition allows it to form a stable, rust-like surface layer upon exposure to the atmosphere, which acts as a barrier to further corrosion. This self-protecting layer makes Q355NH suitable for outdoor applications, reducing the need for protective coatings or frequent maintenance.
Q355NH weathering steel plate is the high tensile strength weathering steel plate, it has 490-630 Mpa tensile strength. More information about Q355NH weathering steel technology, please see the following:
Q355NH steel plate comprehensive performance: Q355NH steel plate has good weldability and low temperature impact toughness, suitable for architecture, artifacts such as weather resistance of weldments.
Q355NHB steel is quality grade B of Q355NH weather-resistant steel sheet What is the difference between the element composition and tensile requirement of weather-resistant steel plate Q355NHB compared to A588 steel plate?
Q355NHB weathering steel plate characteristics: It has the characteristics of high-quality steel such as toughness, plastic extension, forming, welding and cutting, abrasion, high temperature and fatigue. Q355NHB steel plate is atmospheric corrosion-resistant steel plate, also known as weather-resistant steel plate. It is a low alloy steel series between general steel and stainless steel. Weather-resistant steel is made of ordinary carbon steel with a few corrosion-resistant elements such as copper and nickel. Toughness, plastic extension, forming, welding and cutting, abrasion, high temperature, fatigue resistance, etc.
| Element | Data |
|---|---|
| C(％) | Max 0.16 |
| Si(％) | Max 0.50 |
| Mn(％) | 0.90-1.50 |
| P(％) | 0.035 |
| S(％) | 0.035 |
| Cr(％) | 0.40-0.80 |
| V(%) | 0.02-0.10 |
| Cu(%) | 0.20-0.50 |
| Properties | Data |
|---|---|
| Yield Rp0.2 (MPa) |
745 (≥) |
| Tensile Rm (MPa) |
333 (≥) |
| Impact KV/Ku (J) |
11 |
| Elongation A (%) |
23 |
| Reduction in cross section on fracture Z (%) |
24 |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 242 |
Q355NH steel plate has the characteristics of high-quality steel for toughness, plastic elongation, forming, welding, abrasion, high temperature and fatigue resistance.
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