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?

Military materialsOther varieties are mainly some special quality profiles. Including hollow steel, oxygen bottles, industrial pure iron, hot rolling, cold heading steel easy to cut steel, D60, S/5A, F18, F11 etc., behind several are. High quality steel is not large, medium and small, round and Fang Gang divided into groups according to specifications from, such as 8-10mm, 11-15mm, 18-20mm, 205-245mm. flat area by large, medium and small flat. Six angle distance is not grouped. But the quality of steel group distance is no substitute for detailed specifications, in the document should be filled concrete specifications. Quality profile specification is simple, the vast majority of round steel. In addition, flat steel, and Fang Gang six chest steel, hollow steel, shaped and so on hot rolling (forging) size deviation of high-quality steel, Fang Gang, the six angle of the ordinary high accuracy and precision of two. And has a more precise cold drawn profile surface size and smooth surface polishing, polishing, but also some After polishing or round processing. The polished surface is exquisite, called steel. High quality profiles are rarely used, mostly through the use of the unit for further processing and after heat treatment, therefore, in addition to chemical composition, but also to ensure the mechanical properties after heat treatment.

Q:What does "BH" mean?

BH is welded to H just, and RH is hot rolled H steel.

Q:What does "M" mean?

The former refers to the steel, round steel, flat steel, angle steel, six angle steel; the latter refers to the I-beam, channel steel, steel, steel, steel frame bending etc..

Q:Does the profile include H?

Profiles include section H steelThe online quote H steel and profiles in the angle of groove separate quotation, mainly because H steel has great use compared with the other, and the demand is relatively more, but in some cases, and H type steel I-beam can also substitute for each other.

Q:Elastic modulus of section steel

Generally speaking, the elastic body exerts an external function, and the elasticity experiences the change of the shape (called strain). The general definition of the elastic modulus is that the stress is divided by the strain. When the material is in the elastic deformation stage, its stress and strain should be changed into a positive proportion (that is to say, according to Hooke's law), and the coefficient of proportionality is called the elastic modulus.

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?

The steel sheet pile has various forms, and the sides of the steel sheet and the joint groove are different in shape. The second plate, after the first one is in place, takes the front sheet of the sheet pile and the side notch is used as the driving point. As a result, a plurality of sheet piles may form relatively complete sheet pile walls along the coast (or bank of the river). In addition, a group of steel sheet piles can be used for temporary retaining protection when the foundation pit is excavated or excavated.