Black Painted Hollow Steel Tube ST52.4 , Cold Drawing Precision Steel Pipe

Seamless Precision Hollow Carbon Steel Tube For Hydraulic Systems And Auto Parts

Description:

Chemical Composition and Mechanical Performance:

Delivery Conditions:

+C Hard. No final treatment after final cold drawing.

+LC Soft. Final heat treatment is followed by a suitable drawing pass (limited reduction of area).

+SR Stress Relieved. After final cold drawing, the tubes are stress relieved in a controlled atmosphere.

+A Annealed. After final cold drawing, the tubes are annealed in a controlled atmosphere.

+N Normalized. After final cold drawing, the tubes are normalized in a controlled atmosphere.

Process:

The cold drawn welded tube is produced by drawing ERW (electric resistance welded tube) through a die and over a mandrel plug.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.

Surface treatment: Oiled, black painted, hot dipped galvanized or phosphate coating as required.

Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Standard AND Optional Testing:

Visual and dimensional test 100%.

Eddy current test 100% acc. to EN 10246-3.

Ultrasonic test 100% acc. to EN 10246-7.

Chemical composition.

Impact test.

Mill Test Certificate:

The product is supplied with 3.1.B inspection certificate,according to the standards EN 10204 and ISO 10474.

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.