Q355b Hot Rolled Square Rectangular Steel Pipes Black Carbon Steel Tube

〣National standard Q355B square pipe introduction:

Q355B square tube is a kind of square tube steel. It is a kind of low alloy and high strength structural steel square steel, widely used in Bridges, vehicles, ships, construction, pressure vessels, special equipment, etc., where "Q" means yield strength, 355 indicates that the yield strength of this steel is 355MPa square steel, and the yield value will decrease with the increase of the thickness of the material.

Q355B square tube is a hollow steel. Q355B square tube is a hot rolled or cold rolled strip steel or coil as the base material after cold bending processing and then high frequency welding made of square section shape size of the section steel. In addition to the thickening of the wall, the corner size and the flatness of the Q355B square tube reach or even exceed the level of the resistance welding cold-formed square tube.

〣National standard Q355B square pipe features:

1. Good comprehensive mechanical properties:

Because Q355B square tube has a large moment of inertia and bending strength, can greatly reduce the weight of the structure, save steel. At the same time easy to lift, transport and installation, can improve the efficiency, shorten the construction period, reduce the cost of Q355B square pipe.

2, low temperature performance:

Q355B square tube adopts special formula of high quality carbon structural steel heat treatment of low alloy structural steel Q355B square tube has good low temperature impact resistance (service temperature can reach -100°C). No fracture occurs at -70°C embrittlement temperature. It can be used safely for a long time in the temperature range of -40 ~ -195°C.

3, good plasticity and toughness:

Q355B square tube has excellent plasticity and toughness; Easy to process into various forms of parts; Q355B square tube is widely used in the building structure of the frame beams and columns and mechanical parts. In addition, Q355B square tube can also be used to produce a variety of conventional weapons and other steel structural parts as well as engineering structure and bridge materials.

〣Q355B square tube features

Advantages of Q355B square tube

1. Strong structure

Steel structure is simple, construction period is short, with good assembly

2. Be meticulous

Product quality is good, easy to make closed structure

3. Even wall thickness

Smooth in the use process, long use cycle

4. Weldability

Can be processed again according to demand

〣Parameter