Jiangsu Hongbao Group Co., Ltd.
Jiangsu Hongbao Group Co., Ltd. Manufacture since 1958
Add to Cart
Description:
Precision-crafted welded cold drawn tubes made from carbon alloy steel, ideal for automotive applications due to their exceptional durability and strength. These tubes are meticulously engineered to meet stringent industry standards, ensuring reliability and performance in auto parts. With a seamless finish and precise dimensions, they offer a seamless fit for various automotive components. Their superior quality and resistance to wear make them a preferred choice for critical applications where precision and reliability are paramount.
Manufacturing of the tube and the supply status:
1.All intermediate thicknesses can be manufactured to those indicated in the range of manufacturing
2.The restricted tolerances are accepted after feasibility study
3.Tolerance in thickness: 7,5% of the nominal thickness
4.Commercial length: 3,5 – 7 metres
5.Pre-delivery treatments: +C, +LC. +SR, +A, +N
6.We work with all materials of steel according to standard EN 10305: E195, E235, E275, and E355 and other specific materials as required by the customer(22MnB5, 26MnB5,…)
7.Packed into hexagonal or round bundles
8.Final protection (anti-corrosive oils or paper, plastic boxes, splinting …) according to the customer requirements
Welded drawn
EN 10305-2
(DIN 2393)
E195 (1.0034), E235 (1.0308), E275 (1.0225), E355 (1.0580)
Case hardening / heat treatable steel: C15 (1.0401), C35 (1.0501), 20Mn5 (1.1133)
Boron-alloyed steel: 22MnB5 (1.5528), 26MnB5, 30MnB5 (1.5531), 34MnB5, BTR 165
High strength, microalloyed fine grained steel: S320 - S800 NC + MC (QStE320 - QStE800 N + TP)
Delivery 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.
| Steel Grade | Chemical Composition(%) | ||||||
| Steel name | Steel number | C max | Si max | Mn | P max | S max | Al min |
| E215 | 1.0212 | 0.10 | 0.05 | 0.70 | 0.025 | 0.025 | 0.025 |
| E235 | 1.0308 | 0.17 | 0.35 | 1.20 | 0.025 | 0.025 | - |
| E355 | 1.0580 | 0.22 | 0.55 | 1.60 | 0.025 | 0.025 | - |
Application: automotive industry, machine and equipment building
Size(mm): O.D.:6.0-224.0 W.T.:1-15 L:max 12000
Delivery State: + C (BK drawn for shine/hard)
+ N (NBK normalized)
Process:
The cold rolled 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.
Tube Finishing Options:
Our tubes can be additionally treated to achieve the exact finishes and ends needed by customers. These are some of the additional operations that can be performed on our tube:Drawing, Heat treatment, Bulging, Swaging, Cutting, Deburring, Vibro cleaning, Threading,De-rusting, Chamfering, Washing.
