|Place of Origin:||Jiangsu|
|Minimum Order Quantity:||2MT|
|Packaging Details:||Packaging: Wooden cases|
|Material:||26MnB5||Length:||Random Or Fixed Length|
|Shape:||Round||Technical:||Seamless Or Welded|
|Standard:||EN10305-1, EN10305-2 Etc||Name:||Erw Carbon Steel Pipe|
DOM Welded Carbon Steel Pipe EN10305-2 For Hydraulic Steel Tubing E155 E195 E235 E275 E355
Size range: O.D.:6-420mm W.T.:1-50mm L:max12000mm
Applications: for auto industry/machinery use/oil cylinder tube/motorcycle shock absorber/auto shock absorber/inner cylinder/telescopic cylinders/jack lifting system/hydraulic cylinders
The internal and external surface finish of the tubes is smooth, while the Weld Seam is somehow not visible or tangible.
The ID surface with roughness Ra≤4μm, the best ID smoothness we could reach Ra≤0.8μm
The inner surface can be measured and reported if this is requested by the purchaser before PO.
Supplying Steel Grade:
E155, E195, E235 E275, E355
+C, +LC, + SR, +A, +N
DOM, ERW+ cold drawn
|Cold drawn / hard||+C||Without thermal processing, after the process of cold drawing is finished|
|Cold drawn / soft||+LC||After final thermal processing, appropriate drawing|
|Cold drawn and annealed||+SR||After the final cold drawing process and annealing thermal processing in a controlled atmosphere|
|Annealed||+A||After the final cold drawing process, the pipes are annealed in a controlled atmosphere|
|Normalized||+N||After the final cold drawing process, the pipes are normalized in a controlled atmosphere|
|Steel grade||Maximum values depending on the delivery condition|
|Steel symbol||Rm MPa||A %||Rm MPa||A %||Rm MPa||ReH Mpa||A %||Rm MPa||A %||Rm MPa||ReH Mpa||A %|
|E155||400||6||350||10||350||245||18||260||28||270 do 410||155||28|
|E195||420||6||370||10||370||260||18||290||28||300 do 440||195||28|
|E235||490||6||440||10||440||325||14||315||25||340 do 480||235||25|
|E275||560||5||510||8||510||375||12||390||21||510 do 550||275||21|
|E355||640||4||590||6||590||435||10||450||22||490 do 630||355||22|
|Steel grade||% of the mass|
|Steel symbol||C max||Si max||Mn max||P max||S max|
DOM is a process that is applied to tubing after it is initially constructed.It is refferred to as Seamless ,It can be said that do seamless process method on ERW tubes,So the tubes will have a high strength ,high quality .Material form E155 E195 E235 E275 E355 1020 1026 and so on .DOM tubing is commonly use in auto parts .
Steel Grade and Chemical Compositions
|Steel Name||Steel Number||max||max||max||max||max|
aRm: tensile strength; ReH: upper yield strength; A: elongation after fracture
c Depending on the degree of cold work in the finishing pass the yield strength may nearly be as high as the tensile strength.
For calculation purposes the following relations are recommended:
for delivery condition +C: ReH ≥0.8 Rm
for delivery condition +LC: ReH ≥0.7 Rm
d For calculation purposes the following relation is recommended:ReH≥0.5Rm
Cold rolling by Cold pilger machine and Cold rolling machine
EN10305-2 Cold Drawn Precision Seamless Steel Pipes
2. Steel Grade:
E155,E195,E235,E275,E355, other materials upon agreement with customers.
3. Production method:
Cold drawn on the welded steel tubes, to reach high accuracy on the OD and WT tolerance
4. Size range:
O.D.:20-350mm W.T.:1-35mm L:max12000mm
In Hexagonal Bundles, with anti-rust oil protection, with seaworthy packing
6. Deliver condition:
1). +C No heat treatment after the final cold drawing process
2). +LC After the final heat treatment there is a suitable drawing pass
3). +SR After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere
4). +A After the final cold drawing process the tubes are annealed in a controlled atmosphere
5). +N After the final cold drawing operation the tubes are normalized in a controlled atmosphere
Precision camshaft Tube Small Outside Diameter Welded Pipe 26MnB5 34MnB5 For Cam
The cold drawn welded tube is produced by drawing ERW (electric resistance welded tube).During this process the sizing (wall thickness, inside and outside diameter), as well as weld integrity and surface finish is closely controlled to produce tube of the required size and mechanical property characteristics.
Other Aviliable Material: E155 E195 E235 E275
Outer Diameter Range: 10-50mm
Wall Thickness Range: 1.5-8mm
t/D ≥ 0.2(Normal: t/D=0.1)
Process: Cold Drawn, Cold Rolling
1) +C No heat treatment after the final cold drawing process.
2) +LC After the final heat treatment there is a suitable drawing pass.
3) +SR After the final cold drawing process there is a stress relieve heat treatment in a controlled atmosphere.
4) +A After the final cold drawing process the tubes are annealed in a controlled atmosphere.
5) +N After the final cold drawing operation the tubes are normalized in a controlled atmosphere.
Advantage (compare with seamless cold drawn tube)
Improved quality surface
Tight Excentricity and wall thickness tolerances (the eccentric
Tube more safety
Good toughness at low temperature
USA Market: 90% of the cylinder in the USA market are produced with welded tubes
Cost fix Lengths More Cheaper