What is the steel Q345NQR2? TB/T 1979-2014  Q345NQR2 steel is a new Chinese steel grade of atmospheric corrosion resisting steel.According to TB/T 1979-2014, Q345NQR2 steel has minimum yield strength of 345MPa.  “Q” is the first letter of Chinese Pinyin: “Qufu”, which means Yield Strength, “355” is the minimum value of yield strength 355 MPa. “NQ” means the first letter of Chinese Pinyin“NaidaQifushi”, which means atmospheric corrosion resisting.R is short for as rolled. Material: Q345NQR2 grade Standard: TB/T 1979-2014 Equivalent: hot rolled 09CuPTiRE-A Category: atmospheric corrosion resisting steel for railway rolling stock What are the technical data of Q345NQR2 steel? Mechanical properties for TB/T 1979 Q345NQR2 Steel Plate Yield strength (≥Mpa) Tensile strength (≥Mpa) Elongation % ≥ 345 480 24 Chemical composition for TB/T 1979 Q345NQR2 steel plate (heat analysis%) C max Si Mn P S max Cu  Cr Ni 0.12 0.25-0.75 0.20-0.50

TB/T 1979-2014 Q345NQR3 atmospheric corrosion resisting steel Standard: TB/T 1979-2014 Equivalent: hot rolled 09CuPTiRE-B Category: atmospheric corrosion resisting steel for railway rolling stock Q345NQR3 steel is a new Chinese steel grade of 09CuPTiRE-B atmospheric corrosion resisting steel.According to TB/T 1979-2014, Q345NQR3 steel has minimum yield strength of 345MPa. Mechanical properties for TB/T 1979 Q345NQR3 Steel Plate Yield strength (≥Mpa) Tensile strength (Mpa) Elongation % ≥ 345 480 24 Chemical composition for TB/T 1979 Q345NQR3 steel plate (heat analysis max%) C Si Mn P S Cu Ti RE 0.12 0.20-0.50 0.25-0.70 0.06-0.12 0.02 0.25-0.50 0.03 0.01-0.04 Q345NQR3 steel plates and Q345NQR3 steel coils in BBNSTEEL's stock warehouse are ready for shipment.These Q345NQR3 steel plates shall be done low temperature impacting test at -40 Deg.C with impact energy 27J for plate thickness equal or above 12mm. Technical