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TB/T 1979 Q345NQR3 weathering steel plate and coil

TB/T 1979 Q345NQR3 weathering steel plate and coil

Posted:2021-07-07 14:01:01
TB/T 1979 Q345NQR3 weathering steel specification
Standard: TB/T 1979-2014 
Material: Q345NQR3 
Equivalent: 09CuPTiRE-B hot rolling
Category: corten steel, weathering steel, atmospheric corrosion resisting steel for railway rolling stock 
Shapes: steel plate, steel coil and steel section 
Q345NQR3 available steel size: 1.2mm to 20mm 
Q345NQR3 steel meaning 
The first charater “Q” is the first letter of Chinese Pinyin: “Qufu”, which means Yield Strength. 
The number 355 is the minimum value of yield strength 355 MPa. 
NQ means the first letter of Chinese Pinyi “NaidaQifushi”, which means atmospheric corrosion resisting. 
R is short for as rolled. 
3 -Indicates the steel belongs to Cu, P, Ti (RE) series weathering steel. 

Q345NQR3 corten steel shall be done low temperature impacting test at -40 °C with impact energy 27J for the plates thickness equal or above 12mm. 
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