304 Stainless Steel Seamless Pipe

304 stainless steel seamless pipe is widely used as a kind of chromium - nickel stainless steel. As a widely used steel,its characteristic is corrosion resistance, good heat resistance, high strength in low temperature, easy to process on punching, bending and other thermal processing, non hardening heat treatment (when temperature is -196℃ to 800℃), Corrosion resistant in the atmosphere,if it is in the industrial atmosphere or heavy pollution areas, you need to clean in time to avoid corrosion.

We are reckoned for the supplying and trading of a gamut of best quality s s 304 Welded Pipes & pipes. The offered products are widely regarded for their sturdiness. Manufactured under the strict vigilance of experts and professionals at the vendor’s end, the whole range of high quality pipes and pipes offered by us is highly acclaimed. Our offered product is customized as per client's requirements.

Used in food industries,chemical industries , electrielcal industries, genrater industries, shaft industries, cement industries, gais industries power project.

Stainless Steel 304 Pipe New Fresh Stock

Size 1/4' to 24

Thickness: 1.4mm , 1.5mm , 2mm , 3.5mm , 4.5mm , 6.5mm

Width: 1250mm , 1500mm

Length: 2500mm , 3000mm & Coils

Finish: 2b , BA (Mirror) , MAT/PVC

Features

Optimum quality/Abrasion resistant/Durable

Application Area

Decorating, chemical industrial, agricultural industry,shipping industry and other industries.

Chemical Composition(WT%)

C ≤ 0.08

Si ≤ 1.00

Mn ≤ 2.00

Cr: 18.0 to 20.0

P ≤ 0.060

S ≤ 0.030

Ni: 8 to 10.5%

Physical Property

Tensile Strength ≥ 520MPa

Yield Strength ≥ 205MPa

Elongation ≥ 40%

The following table is the size of the pipe. For any other detail information, please feel free to contact us.

Usually, it only takes 3 working days for us to make delivery if the products are ready in stock.

Of course, unusual size can also be customized according your request.

Stainless Steel Seamless Tube

Seamless stainless steel pipe empty section, the surrounding no seams of long steel. The thicker the wall thickness of the product, the more economic and practical, the thinner the wall, its processing costs will be greatly increased.

The process of the product determines its limitations can, general seamless steel tube precision: uneven wall thickness, the appearance of low brightness in the tube, the height of the fixed ruler, and inside the appearance of hemp spots, black spots removal; its detection and shaping must be off-line. Therefore, it embodies its superiority in high pressure, high strength and mechanical structure.

Stainless Steel Introduction

A, according to gb14975-2002 "stainless steel seamless pipe, steel pipe usually length (indefinite ruler) hot-rolled steel pipe 1." 5~10m, the hot extrusion pipe is equal to and greater than 1m. Cold (rolled) steel pipe wall thickness 0.5~1.0mm, 1.0~7m, wall thickness greater than 1.0mm, 1.5~8m.

B, hot-rolled (hot extrusion) steel pipe diameter 54~480mm a total of 45 species; wall thickness 4.5~45mm Total 36 species. The diameter of cold (rolled) steel pipe is 6~200mm 65 species, wall thickness 0.5~21mm Total 39 kinds.

C, steel tubes inside and outside the surface shall not have cracks, folding, cracking, crack, rolling, separation and scab defects, these defects should be completely removed (except for mechanical processing pipe), after the removal of the wall thickness and outside diameter beyond the negative deviation. Any minor surface defects that do not exceed the allowable negative deviation may not be removed.

D, straight allow depth. Hot-rolled, hot extrusion steel pipe diameter is less than and equal to 140mm of the nominal wall thickness of 5%, the maximum depth is not greater than 0.5mm; Cold drawn (rolled) steel pipe is not less than the nominal wall thickness of 4%, the maximum depth is not greater than 0.3mm.

E, pipe ends should be cut into right angle, and remove Burr.

Manufacturing Process of Stainless Steel Seamless Pipe

1.  Hot-rolled (extruded seamless steel tube): round tube billet → heating → perforation → three-roll skew rolling, rolling or extrusion → off Tube → sizing (or reducing) → cooling → straightening → hydraulic test (or flaw detection) → Mark → Storage

   
   

Rolling seamless pipe raw material is the round tube billet, the round tube embryo to pass through cutting machine cutting processing into a length of about 1 meters of blank, and through the conveyor belt to the furnace heating. The billet is heated in a furnace, at temperatures of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. The temperature control in the furnace is a key problem. After the round tube billet is released, it is worn through pressure piercing. Generally more common is the cone-shaped roller piercing machine, this kind of piercing machine production efficiency, product quality, perforation expansion of large, can wear a variety of steel. After perforation, the round tube billet has been three rollers oblique rolling, rolling or extrusion. After extrusion, the diameter of the tube will be off. The sizing machine rotates into the steel embryo through the cone bit high speed to form the steel pipe. The diameter of the steel tube is determined by the diameter of the diameter machine bit. After the diameter of the steel pipe, into the cooling tower, through the water spray cooling, steel pipe after cooling, will be straightened. After straightening, the steel pipe is sent to the crack machine (or hydrostatic test) for internal flaw detection. If there are cracks in the steel tube, bubbles and other problems will be detected. Steel pipe inspection After the strict manual selection. After the steel pipe quality inspection, spraying with paint number, specifications, production batches and so on. The crane is hoisted into the warehouse.

2. Cold drawing (rolling) seamless steel tube: round tube billet → heating → perforation → head → annealing → pickling → oil (copper) → multi-Channel cold drawing (cold rolling) → billet Tube → heat treatment → straightening → hydraulic test (flaw detection) → mark → storage.

The rolling method of cold (rolled) seamless steel tube is more complicated than that of hot rolling (extruded seamless steel pipe). The first three steps of their production process are basically the same. The difference starts from the fourth step, the round tube billet is beaten empty, to start, anneal. After annealing, special acidic liquids are used for pickling. After pickling, apply oil. Then it is followed by a number of cold drawn (cold-rolled) billet tube, specialized heat treatment. After heat treatment, it will be straightened.

304 Stainless Steel Seamless Pipe Square Pipe (Packing)

304 Stainless Steel Seamless Pipe in Stock

304 Stainless Steel Seamless Pipe(Polished)

304 Stainless Steel Seamless Pipe (Unpolished)