Q:How to distinguish cold formed section steel and hot rolled section steel?

Hot rolled steel is a kind of steel with various geometrical cross section formed by heating billet. According to the different angles can be divided into flat steel, steel section, steel and I-shaped steel and hot-rolled L steel; steel according to the different section shape, divided into simple and complex section or section section and section three steel cycle:The characteristics of the simple section are the cross section, any point on the periphery as a tangent, generally not cross section, such as round steel, square steel, six angle steel, flat steel, triangular steel, arch steel and elliptical steel.Complex sections include angle steel, I-beam, channel steel, T steel, H steel, Z steel, rail, steel plate pile, window frame steel and other miscellaneous section steel;The periodic section shape and dimension along the length direction of the steel section changing periodically, such as rebar, axle and steel ploughshare.

Q:What is special steel?

Plough steelUsed in the manufacture of general purpose plow, plows, shallow tillage implements main plough and ordinary before plow ploughshare, general wear and has sufficient strength and toughness of the steel. China's general use of 65Mn and 65SiMnXt steel. In addition, often make tools steel and special steel shape. Such as T steel, Z steel, arc type steel, double reinforcing steel, strengthen the font, grass blade steel, flat steel and steel rod concave lines. The cold-formed steel: cold-formed steel is the main material for the production of light steel structure, made of steel or steel roll forming. It not only the wall thickness can be made very thin, but also greatly simplifies the production process, improve production efficiency, can be produced using the general method to produce uniform wall thickness and complex cross sections of various shapes and different materials of cold-formed steel cold-formed steel. Except for the building structure, but also widely used In vehicle manufacturing, agricultural machinery and so on. A lot of cold-formed steel varieties, according to the opening section, semi closed, closed. According to the shape of a cold roll, angle steel, Z steel, square tube, rectangular tube, special pipe, shutter door according to the provisions of GB6725-92, cold-formed steel with ordinary carbon negative structure and quality carbon steel, low alloy steel plate or strip made of cold-formed structure

Q:What does "BH" mean?

In accordance with the different smelting quality of steel, steel is divided into ordinary steel and high quality steel. According to the current catalogue of metal products, ordinary steel can be divided into large section steel, medium section steel and small section steel. The section steel can be divided into I-beam, channel steel, angle steel, round steel and so on according to its sectional shape.

Q:What does "M" mean?

Section steel is a strip steel with definite section shape and size. It is one of the four big kinds of steel (plate, tube, mould, wire). According to the section shape, the section steel is divided into simple section steel and complex section steel (deformed steel).

Q:Does the profile include H?

In addition, the profiles include: profile steel, including gear ring, horseshoe steel, pole steel, foot plate, shallow channel, small channel steel, T-shaped steel, ball flat steel, send steel, hot-rolled, six angles, etc.. There are also rivets, steel, farm tools, steel, window frames, steel. Cold bending, cold drawn steel and so on.

Q:Elastic modulus of section steel

The elastic modulus of steel is 2.1 * 10^7N/cm L.

Q:Can the section steel butt joint in the end?

Docking is usually available.If welding, it is mainly worried that the welding is not strong and the welding stress is too large. The wall thickness of the section steel is thin, and the butt welding itself is the most unreliable. So, in the joint lining board, fillet welded. Attention is paid to reducing stress in the process.Bolt connection also requires lining plate, pay attention to bolt size, quantity and spacing. To calculate whether thin-walled steel itself will be crushing, the solution is solder paste board, and bolt holes.In short, the principle is that the strength of the butt joint is not weaker than that of other parts, and there is no greater stress.

Q:What are the common types of profiled steel?

Complex section steel has: I-beam, channel steel, steel, elevator rail, steel sheet pile, and various kinds of agricultural machinery, machinery manufacturing and construction of special-shaped steel.Section steel according to production methods are: hot-rolled steel, cold-formed steel, welding, H steel, etc.

Q:What kind of steel is used in steel columns?

At present, there are 3 kinds of steel pile commonly used in engineering construction, they are steel pipe column, steel column and steel sheet pile.