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Quick Details

  • Standard: ASTM, BS, GB, ASTM A53M-2007, BS 1387, GB/T 13793-1992
  • Grade: Q195-Q345, Q195, Q215, Q235, Q345, Q195/Q235/Q235B
  • Thickness: 1.2 - 17.5 mm
  • Section Shape: Square
  • Outer Diameter: 20*20 to 500*500
  • Place of Origin: Tianjin, China (Mainland)
  • Secondary Or Not: Non-secondary
  • Application: Structure Pipe, construction
  • Technique: Hot Rolled
  • Certification: ISO certificate
  • Surface Treatment: Can be oiled
  • Special Pipe: Thick Wall Pipe
  • Alloy Or Not: Non-alloy
  • Product name: Black square tube / Hollow section
  • surface: black / can be oiled
  • Sizes: 20mmx20mm to 500mmx500mm
  • Wall Thickness: 1.2mm to 17.7 mm
  • Length: 5.8m / 6 m/12m or customized
  • Package: by bundle or customized
  • Brand Name: hengji

Packaging & Delivery

Packaging Details Export Standard package By bundle or customized.
Delivery Time 30days


Product Description

 Black Square tubes /Square pipe/ Black Hollow section 


Specification of hollow section : 

 Material : Q195 , Q235, Q235B 

Production Flow

Black Square Tube

Black Square hollow section :

Package of Black Square tube : 


Overview of Factory

 We Tianjin Hengji Steel Co., Ltd are Manufacturer of Steel tubes for more than 14 years . There are 13 ERW production lines, and 4 hot dip Galvanized production lines.  


Finished Products

 Hollow section . Black Rectangular Steel tubes, Rectangular sections, rectangular steel tube , RHS , Square steel tube.



Certificate of ISO : 


If you are in need of  our Black Square tube / hollow section , please feel free to contact. we are very glad to check the price for you. 


Hollow section/ Square tubes / Black Square tubes

Transaction History of the Supplier

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Transaction Overview


Transaction Details

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China (Mainland) | Manufacturer, Trading Company
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Top 3 Markets:
Domestic Market 100.00%
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Supplier's Trade Assurance Limit: US $86,000
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