Q355NH steel plate under China GB/T 4171 standard, it is a kind of weathering steel. 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?
Q355NH weathering steel features
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.
Chemical composition(mass fraction)(wt.%) of the Q355NH
| 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 |
Mechanical properties of steel grade Q355NH
| 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 |