Q345NQR3 weathering steel plate is a kind of weathering steel (that is, a kind of atmospheric corrosion resistant steel, used in sulfur-containing flue gas, air preheater, economizer, boiler air preheater, to prevent acid dew point, etc.). It is commonly used in low temperature Weathering steel has relatively strong resistance to low-temperature corrosion.
Q345NQR3 steel plate executive standard: TB/T 1979-2014. In the new standard, Grade Q345NQR3 is used instead of 09CuPTiRE-B.
Chemical composition of Q345NQR3 steel
Grade |
C |
Si |
Mn |
P |
S |
Cu |
Ti |
RE |
|
Q345NQR3 |
≤0.12 |
0.20-0.50 |
0.25-0.70 |
0.060-0.12 |
≤0.020 |
0.25-0.50 |
≤0.030 |
0.010-0.040 |
Delivery status: delivered in hot-rolled or annealed state after hot-rolling. According to the agreement between the supplier and the buyer, the hot-rolled steel plate can be delivered after pickling; when the steel plate is delivered in the flat state, the four sides of the steel plate should be cut neatly and at right angles.
Smelting method: steel is smelted by oxygen converter or electric furnace.
Q345NQR3 steel plate is outdoor steel for containers, power plant chimneys, railway projects, such as steel for large outdoor sculptures. Weathering steel (that is, atmospheric corrosion resistant steel) is a low-alloy steel series between ordinary steel and stainless steel at a low price and good quality.
