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TB/T 1979 Q345NQR2 steel for railway rolling stock

TB/T 1979 Q345NQR2 steel for railway rolling stock

Posted:2021-07-06 14:43:38

TB/T 1979 Q345NQR2 steel is a new Chinese steel grade of 09CuPTiRE-A atmospheric corrosion resisting steel according to TB/T 1979-2014.
The Q345NQR2 equivalent steel grades are ASTM A588/A588M specification A588 Grade A,A588 Grade B,A588 Grade C and A588 Grade K. Katalor keeps stock for Q345NQR2 steel sheet with thickness from 2-20mm,width with 1000-2000mm and any length in feet.
Standard: TB/T 1979-2014
Grade: Q345NQR2
Category: atmospheric corrosion resisting steel for railway rolling stock
Q345NQR2 steel specification: Thickness: 1.6mm-60mm, Width: 1000mm-4200mm, Length: 3000mm-18000mm

Chemical composition of Q345NQR2 steel




Grade

C

Si

Mn

P

S

Cu

Cr

Ni

Q345NQR2

≤0.12

0.25-0.75

0.20-0.50

0.060-0.12

≤0.020

0.25-0.50

0.30-1.25

0.12-0.65

Mechanical properties



Grade

Thick, mm

Yield strength, MPa

Tensile strength, MPa

Flexion ratio

Elongation, A%

180°Bend test

Q345NQR2

≤6

≥345

≥480

≤0.75

≥24

D=a

>6

D=2a

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.
Scope of application
Q345NQR2 steel is widely used for containers, railway vehicles, construction machinery and construction steel structures, and structural parts.

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