Q345 alloy tube

Q345-Q345 low alloy tube

 

Q345 low alloy tube is a series of low-alloy ---- high strength low alloy structural steel (GB/T1591-1994).

Q345A, B, C, D, E are the representatives of such steel grades, wherein the Q345A alloy tube, Q345B alloy pipe grade steel often referred 16Mn, such material for the most common;

Q345 low alloy tube representation: Q represents the yield of this material, behind the 345, refers to the yield value of this material, in the 345 or so. (Similar to the naming method of Q235) and the yield value is reduced with the increase in the thickness of the material so that it.

In addition to containing the basic elements of a certain amount of silicon or manganese, high strength low alloy structural steel, also contain other elements that fit our resources. Such as vanadium (V), niobium (Nb), titanium (Ti), aluminum (Al), molybdenum (Mo), nitrogen (N), and a rare earth (RE), and other trace elements. By chemical composition and performance requirements, the grade Q295A, B, and Q345A, B, and C, D, E, Q390A, B, and C, D, E, Q420A, B, and C, D, E, Q460C, and D, E, etc. grade steel, carbon structural steel of the meaning.

Q345 low alloy tube with carbon structural steel than. With the advantages of high strength, good overall performance, long service life, a wide range of applications, and more economical. The steel multi-rolled into plates, profiles, seamless steel pipe, is widely used in bridges, ships, boilers, vehicles and important building structure.

Q345A, Q345B, Q345C, Q345D, Q345E. This is a hierarchical distinction, as represented by the impact of different temperature.

Q345A level does impact; Q345B grade is 20 degrees room temperature impact; Q345C level is 0 degree impact; Q345D level is -20 degrees impact; the Q345E level is -40 degrees impact. Temperature in the different impact, the shock value is also different.

Due to the implementation of the standard, such steel plate allow negative tolerance Delivery.