Q345 alloy tube

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

Q345A alloy tube, grade Q345B alloy tube usually say 16 mn steel, the material is the most common; Q345 alloy tube said methods: Q represent the material yield, behind the 345, is refers to the material yield value, at around 345 (analogous to the naming of Q235 method) would be increased with the increase of the thickness of the material and the yield value decreases.

Q345 alloy tube formula: [] - wall thickness (diameter) * wall thickness * = 0.02466 kg/m (weight of per meter)

High strength low alloy structural steel pipe in addition to the basic elements contain a certain amount or silicon manganese, also contain other suitable elements resources situation in our country. Such as vanadium (V), niobium (Nb), titanium (Ti), aluminum (Al), molybdenum (Mo), nitrogen (N) and rare earth (RE), and other trace elements. According to chemical composition and performance requirements, its brand by the Q295A, B, Q345A, B, C, D, E, Q390A, B, C, D, E, Q420A, B, C, D, E, Q4, 60 C, D, E grade steel, said the meaning with carbon structural steel .

Such steel Q345 seamless tube with carbon structural steel, has high strength, good comprehensive performance, long service life, wide application range, comparative economic advantages. The steel rolled into sheet, profiles, welded steel pipe, etc., are widely used in Bridges, ships, boilers, vehicles, and important building structure.

Q345A, Q345B, Q345C, Q345D, the level of Q345E is this distinction, represented mainly by the impact of temperature is different.

Q345A, don't do impact;

Grade Q345B, impact is 20 degrees at room temperature;

Grade Q345C, impact is 0 degrees;

Q345D grade, is 20 degrees - impact;

Q345E level, it is - hit 40 degrees.

In the impact of different temperature, impact value is also different. Due to the implementation of standards, this kind of steel plate allows the minus tolerance of delivery.

If you would like to know more about this,pls visit:Hunan great steel pipe co.,ltd