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ASTM GB DIN Seamless Hollow Steel Tube Black Oiled Round Carbon

Place of Origin Jiangsu, China
Brand Name Hongbao
Certification TS16949,DNV,PED,ISO,TUV,LR
Model Number HBHST-1
Minimum Order Quantity 1 ton
Price Negotiable
Packaging Details Original packaging according to the customers Export standard package in bundled or as required.
Delivery Time within 50 days
Supply Ability 30000MT per year
Product Details
Brand Hongbao Material ST37.4,ST52.4,E235,E355,26MnB5,34MnB5
OD 6-120mm Thickness 0.5-15mm
Shape Round Type Welded Or Seamless
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GB DIN Seamless Hollow Steel Tube


ST37.4 Hollow Steel Tube


Hollow Steel Tube 15mm

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Product Description

ASTM GB DIN Standard Seamless Steel Tube Black Oiled Round Carbon Steel Tube


Structure Purposes
General structure and mechanical
Liquid Services
Petroleum, gas and other fluids conveying
Low and Medium Pressure Boiler Tube
Steam and boiler manufacturing
Hydraulic Pillar Service
Hydraulic support
Auto Semi-shaft Casing
Auto sem-shaft casing
Line Pipe
Oil and gas conveying
Tubing and Casing
Oil and gas conveying
Drill Pipes
Well drilling
Geological Drilling Pipe
Geological drilling
Furnace tubes, heat exchangers tubes
Furnace tubes, heat exchangers



End Shape

Beveled end, plain end, vanished, or adding plastic caps to protect the two ends as per customer's




Oiled, Galvanized, Phosphate etc
Technique Cold drawn & cold rolled
Application 1. Automotive and mechanical pipes
2. Petroleum cracking pipes
3. High Pressure Boiler Pipe
4. Low and middle pressure fluid transportation pipeline
5. Chemical fertilizer equipment pipes
6. Heat exchanger pipes



1. BK (+C) No heat treatment after last cold forming process.
2. BKW (+LC) After last heat treatment there is a light finishing pass (cold drawing)
3. BKS (+SR) After the final cold forming process the tubes are stress relieve annealed.
4. GBK (+A) After the final cold forming process the tubes are annealed in a controlled atmosphere.
5. NBK (+N)

After the final cold forming process the tubes are annealed above the upper

transformation point in a controlled atmosphere.

Package 1. Bundle Packing.
2. Plain end or vanished as per customer's request.
3. Wrapped in waterproof paper.
4. Sackcloth with several steel strips.
5. Pack in heavy tri-wall boxes.































Delivery condition of seamless cold drawn mechanical tubing

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

BKW (+LC) Cold finished/soft

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

GBK (+A) Annealed.

NBK (+N) Normalized.



Fuel injection lines/nozzles for diesel or gasoline engine;
Compressed natured gas CNG tube
Drive transmission: steering column elements