E355 EN10305-2 WT0.5 Cold Drawn Precision Welded Steel Tube DOM Tube Stabilizer Straight Steel Pipe

Cold Drawn Precision Welded Steel Tube DOM Tube Stabilizer Straight Steel Pipe

Description:

EN10305-2 Cold Drawn Welded Precision Steel Tubes DOM tubing E155,E195,E235,E275,E355 +C +LC +SR +A +N

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:

aRm: tensile strength; ReH: upper yield strength; A: elongation after fracture
b 1Mpa=1N/mm2
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

Production Process:
Cold rolling by Cold pilger machine and Cold rolling machine
Size: 20-350mm

Standard:
EN10305-2 Cold Drawn Precision Seamless Steel Pipes

Steel Grade:
E155,E195,E235,E275,E355, other materials upon agreement with customers.

Production Method:
Cold drawn on the welded steel tubes, to reach high accuracy on the OD and WT tolerance

Size range:
O.D.:20-350mm W.T.:1-35mm L:max12000mm

Packing:
In Hexagonal Bundles, with anti-rust oil protection, with seaworthy packing

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

Jiangsu Hongbao Group (Pipe) Co., Ltd. (Zhangjiagang Hongda Pipe Co., Ltd.) is a high-tech company in Jiangsu province. The company has a registered capital of RMB 89 million, covers an area of 130,000 square meters, employs 600 staff, and has annual sales of RMB 400 million. The company is specialized in producing and selling high-end bearing tubes, auto alloy tubes, titanium and titanium alloy tubes, nickel and nickel-based alloy tubes, refrigerator condenser tubes, aluminum and aluminum alloy tubes and the like.
The company focuses on the development of new products, and has successively developed high diameter-wall ratio titanium-molybdenum-nickel alloy seamless steel tubes, nuclear power plant reactor driving mechanism used martensite stainless steel seamless steel tubes, auto critical components used alloy steel tubes, high-end refrigerator used corrosion-resistance galvanized condenser tubes, marine engineering and complex environment oilfield used high-strength corrosion-resistance G3 tubes, among which, nuclear power plant reactor driving mechanism used martensite stainless steel seamless steel tube has obtained high-tech product certificate of the province.
At present, the company has obtained authorization for 7 patents for invention, and 8 patents for utility model.