What is the grade Q345NQR2?

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
0.06-0.12
0.020
0.25-0.50
0.30-1.25
0.12-0.65

In the market, these Q345NQR2 steel plates are highly appreciated because of various good features it holds. Also, it has become an ideal choice for various purposes in industries. The feature it is having is the high tensile strength, good dimensional accuracy, high durability, high flexibility, excellent surface finishes, and longevity. It is 100% assuring in resistance to corrosion, crevice corrosion resistance, stress corrosion cracking resistance and anti-corrosive in nature.
Done is better than perfect.

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