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316 316L Stainless Steel Round Pipe Hollow Bar Type For Hydraulic

Shandong Modern International Trade Co., Ltd.

316 316L Stainless Steel Round Pipe Hollow Bar Type For Hydraulic

Brand Name : Modern

Model Number : 316 316L

Certification : BV

Place of Origin : China

MOQ : 500KG

Price : Negotiable

Payment Terms : L/C, D/A, D/P, T/T, Western Union

Supply Ability : 1000 Tons Per Months

Delivery Time : 3-5 working days if this goods is stock goods.

Packaging Details : Export standard package: bundled wooden box, suit for all kinds of transport,or be required.

Type : Welded,Seamless

Shape : Round

Finish : Brush Polish,hairline,bright

Standard : ASTM,JIS,AISI,DIN,EN

Technique : Cold Rolled Hot Rolled

Material : 200 Series/300 Series/400series

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316 316L stainless steel round pipe hollow bar use for hydraulic

Metal tube and hollow bar are used in a wide variety of structural applications. They offer a cost advantage to solid metal bar stock, while weighing less than a solid bar of the same material and size, yet still providing much strength. While tube and hollow bar can be similar in shape, we will look at the difference between tube and hollow bar.

The difference between tube and hollow bar include:

Difference:

  • Manufacturing Process

  • Quality

  • Materials

Manufacturing Process:

A big difference between welded tubing and hollow bar is how the two are made. Tube is made by taking slit coils of a base metal and running it through a tube mill, which is a series of dies that form the slit coil into a tube shape; either round, square, or rectangular for example. Once formed into the desired shape, the edges are joined together with a weld. The welding process can vary depending on the material type, material thickness, and preference of the manufacturing team. Typically, high frequency welding or electric resistance welding is used. The excess weld metal is then removed from the outside. Frequently, the newly joined tubing is then brought through an annealing process to create a homogenous final product.

With hollow bar, welding is not used. There are two main ways to create hollow bar, with the process depending on material type and dimensional tolerance requirements. One method for creating hollow bar is called drilling. This process involves sending a drill through a solid bar stock of material. This process can produce highly accurate part dimensions for critical applications. The second method is centrifugal casting. This is when a round mold is rotated at high speeds as molten metal is poured into the mold. The force created by the spinning mold forces the molten material to the inside mold wall where it cools and hardens. Centrifugal casted hallow bar tends to be dense and uniform. There are really only two metals that refer to hollow bar; stainless steel and bronze.

Quality:


Hollow bar can be made to be extremely homogeneous and can also possess very tight dimensional tolerances. On the other hand, achieving tight dimensional tolerances can be more challenging with tube. Also, if care is not taken by the manufacturer, the welding process used for manufacturing tube can potentially create a lower quality product than desired. The excess weld metal should be removed to avoid stress concentrators in the welded tubing. Also, the tube should be annealed or heat-treated after welding to ensure that a homogenous product is being created. Welding processes can create different crystalline structures near the weld zone which could affect the desired mechanical properties of the tubing.

Materials:


A wide variety of materials can be formed into welded tubing. If the material can conduct electricity, electric resistance welding can be used to weld the material onto itself to create tubing.

Hollow bar can be created out of most materials as well. However, harder and stronger materials may prove to be too difficult to extrude so the piercing method could be used instead.

In the end, the choice between using tube or hollow bar will ultimately come down to the application, as one is not universally better or cheaper than the other. Depending on the material type and tolerances, several design considerations should be taken into account before a choice between the two is made.

Chemical Composition Compared:

Material C Si Mn P S Ni Cr Mo N
316 ≤0.08 ≤1.00 ≤2.00 ≤0.035 ≤0.03 10.0~14.0 16.0~18.5 2.00~3.00 ≤0.10
316L ≤0.03 ≤1.00 ≤2.00 ≤0.045 ≤0.03 10.0~14.0 16.0~18.0 2.00~3.00 ≤0.10


Mechanical Properties Compared:

Grade UNS Tensile Strength (MPa) min Yield Strength (MPa) min Elongation (%) min Brinell Hardness (HB) max Rockwell Hardness (HRB)max
316 S31600 515 205 40 217 95
316L S31603 485 170 40 217 95


Product Photos:

316 316L Stainless Steel Round Pipe Hollow Bar Type For Hydraulic

316 316L Stainless Steel Round Pipe Hollow Bar Type For Hydraulic


Product Tags:

ss round pipe

      

stainless steel welded pipe

      
 316 316L Stainless Steel Round Pipe Hollow Bar Type For Hydraulic Manufactures

316 316L Stainless Steel Round Pipe Hollow Bar Type For Hydraulic Images

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