Alloy is a mixture of two or more metals and metal or non-metal synthesized by a certain method with metallic characteristics. It is generally obtained by fusion into a uniform liquid and solidification. According to the number of component elements, it can be divided into binary alloy, ternary alloy and multicomponent alloy. Two or more kinds of metals are uniformly fused together through a certain process, which is an alloy, such as copper and zinc composed of brass, copper and tin composed of bronze, copper and nickel composed of white copper, stainless steel are all alloys containing chromium, nickel and titanium and other metals.

Round steel belongs to carbon structural steel for construction and machinery, while square steel belongs to carbon structural steel for machinery. Both of them are simple section steel, and their section shapes are respectively round and square. Low carbon is mainly used for drawing wire, forging rivets, bolts, nuts and other metal products of raw materials. Medium carbon round steel and square steel are generally used to make mechanical structural parts.

Stainless steel round steel belongs to a class of long wood, and belongs to a class of bar, the so-called stainless steel round steel refers to a uniform circular cross-section of long wood, generally about four meters long. It can be divided into light circles and black rods. The so-called light circle refers to the smooth surface and comes from the quasi-rolling treatment; The so-called black rod refers to the black and thick surface and is directly hot-rolled.

The main alloying elements are magnesium and silicon, which have excellent processing performance, excellent weldability, extrusion and electroplating, good corrosion resistance, good toughness, easy polishing, color film formation, excellent anodizing effect, and are typical extruded alloys.

Copper pipe, a type of non-ferrous metal pipe, is pressed and drawn seamless pipe. Copper pipe has the characteristics of good electrical conductivity, thermal conductivity, conductive parts of electronic products and the main material of heat dissipation accessories, and has become the first choice for modern contractors in the installation of water pipes, heating and cooling pipes in all residential commercial housing. Copper pipe has strong corrosion resistance, is not easy to oxidize, and is not easy to react with some liquid substances, and is easy to bend.

Copper bar is a kind of non-ferrous metal processing bar, which has good processing properties and high electrical conductivity.

201 stainless steel pipe is mainly used for decorative tubes, industrial tubes and some shallow stretched products. Such as: oil waste gas combustion pipeline; Engine exhaust pipe; Boiler shell, heat exchanger and heating furnace components; Silencing parts for diesel engine; Boiler pressure vessel; Chemical transport vehicle; Expansion joint; Spiral welded pipe for gas furnace pipe and dryer, etc.

The better weldability also makes 4130 Carbon Steel Pipe a popular choice in the aerospace industry, which is used to manufacture commercial and military aircraft components requiring high strength and low weight. Examples include gears, piston pins, etc. Other uses of 4130 steel include auto parts, cutting tools and drilling machines.

Seamless pipe, as the name suggests, is a pipe without a seam or a weld-joint. Seamless Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow pipe.

Welded steel pipe refers to the steel pipe with joints on the surface, which is welded by bending the steel strip or steel plate into a round or square shape. The billet of welded steel pipe is steel plate or strip steel.