EN10305-1 E235 E355 Cold Drawn Seamless Steel Tube Normalized Cold Drawn Precision Steel Tube

Description

DELIVERY CONDITIONS

The tubes can be produced in the following delivery conditions:

BK (+C) Cold finished/hard (cold finished as drawn).

No heat treatment after the last cold forming process.

BKW (+LC) Cold finished/soft (lightly cold worked)

After the last heat treatment there is a light finishing pass (cold drawing).

BKS (+SR) Cold finished/stress relieve annealed.

After the final cold forming process the tubes are stress relieve annealed.

GBK (+A) Annealed.

After the final cold forming process the tubes are annealed in a controlled atmosphere.

NBK (+N) Normalized. (Mainly focus on)

After the final cold forming process the tubes are annealed above the upper transformation point 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.