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A Hollow Structural Section, or HSS, is a type of metal with a hollow tubular section. These sections can be circular (CHS), square (SHS) or rectangular (RHS). Hollow Structural Sections, especially RHS steel is commonly used in welded steel frames while SHS and CHS are more often used in columns. Hollow Steel Sections are also commonly used as beams.

The flat square surfaces of RHS has the ability to ease construction, and they are sometimes preferred for architectural aesthetics in exposed structures, but circular Hollow Structural Sections are becoming more popular in exposed structures for the same reasons.

Our company provides a square tube main brands, ASTM A500, ASTM A36, ASTM A572GR50, the allowable deviation of square pipe wall thickness, when not more than plus or minus 10% of the nominal wall thickness of the wall thickness is less than 10mm, when the wall thickness is greater than 10mm plus or minus 8% of the wall thickness, bending angle and weld zone wall thick except.

The usual delivery length of the square moment tube is 4000mm-12000mm, with the majority of 6000mm and 12000mm. The 2x3 rectangular tubing is allowed to deliver short and non - scale products that are not less than 2000mm, and can also be delivered in the form of an interface tube, but the buyer should remove the interface tube when it is used. The weight of short and non - scale products does not exceed 5% of the total deliveries, and the square moment pipe with theoretical weight greater than 20kg/m should not exceed 10% of the total delivery.

Contact us for more information about the 4140 seamless steel tubing !

The round steel is divided into three kinds: hot rolling, forging and cold drawing. It is mainly used to make mechanical parts, seamless tube billets and so on. The specifications of hot rolled round steel are 5.5-250 mm, of which 5.5-25 mm small round steel is mostly supplied by straight bars, usually used as reinforcing bars, bolts and various mechanical parts: hot-rolled round steel larger than 25 mm, mainly used for manufacturing machine parts or seamless steel tube billets.

Hot rolled round steel has many advantages, such as high hardenability, high hardness, good wear resistance and small heat treatment deformation. It is commonly used to make cold work die under heavy load, large production volume and complex shape. But the Q345B low alloy steel is prone to brittleness during its operation. The study shows that the improvement of the morphology and distribution of carbide in Q345B low alloy steel can effectively improve the toughness of the material.

Forged steel refers to the steel that can be made by forging the blank or part. The hot forging process of high sulphur, high copper content or low purity of structural steel is poor. Continuous destruction of sulfur free cutting steel due to poor plasticity, high carbon and high alloy steel with high resistance to deformation, not suitable for cold forging or warm forging. In addition to analyzing the technological properties such as deformation capacity and deformation resistance, the study of forging steel should meet the requirements of the performance and cost of the forgings.

With the development trend of high strength, toughness and lightweight, forging industry is pursuing high material utilization, high accuracy, high efficiency, low energy consumption and low cost. The development of forging steel can not be separated from the development of evaluation and application technology. Easy cutting steel and non quenched hot forging, cold forging heat treatment of steel parts is reduced to simplify the process cost, improve production efficiency and energy saving technology of main materials; micro alloying is to improve the strength and toughness of parts and process performance, high performance and low cost effective means of forging.

Our main products include hot rolled/cold drawn/forged round bar. Can do heat treatment according to the customes’ needs.

Diameter:6mm– 500mm  Length: 1000-12000mm

If you are looking for a reliable 4140 bar stock supplier, please contact us!

Are you looking for reliable 4140 steel plate suppliers? Mould steel plate is a kind of steel used to make mould of cold stamping mould, hot forging mould, casting mould and so on. Mold material is the material and technological foundation of die and mould manufacturing, and the die steel is the traditional die material. Its varieties, specifications and quality play a decisive role in mold performance, service life and manufacturing cycle. The use of the 4140 steel sheet   is very wide, the manufacture of the mold material is very wide, and the most widely used die material is the mold steel.

Categories of mould Steel making process

Cold stamping mould

Cold stamping mould is mainly used to make cold stamping mould steel in a cold state. The scope of cold stamping mould steel is very wide, ranging from various carbon tool steels, alloy tool steels, high speed tool steels to powdered high speed tool steels and powdered high alloy steels. Cold stamping mould steel is a vacuum degassed refined steel, pure in the endogenous, good in machinability, significantly improved metal cutting. excellent wear resistance, good toughness, available made of stainless steel and high hardness material stamping die.

Hot forging mould

Hot forging mould is mainly used to make the mould steel under high temperature conditions. Common hot forging mould steels include alloy steels with medium and high carbon. Hot forging mould steels with special requirements are sometimes made of high-alloy austenitic heat-resistant mould steels.