Thick Wall Welded 20x20mm Black Square Steel Tube

● Pre-galvanized square/rectangular tube: Pre-galvanized square/rectangular tube is made of hot dipped galvanized steel strip directly.


● Hot dipped galvanized square/rectangular : Hot dipped galvanized square/rectangular tube owns thicker zinc coating than pre-galvanized square/rectangular tube. Black tubes will be dipped into zinc pool for galvanizing.


● Electro galvanized square/rectangular : The technology of electro galvanized square/rectangular tube is similar to hot dipped galvanized tube, but the thickness of zinc coating is less than hot dipped galvanized tube.


● Painted square/rectangular:Painted square/rectangular to remove the rust and clean the oil first and then paint the required color paint. 

Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube
Thick Wall Welded 20x20mm Black Square Steel Tube

Standard:GB/T6728:2002 , ASTM A500 , JIS G3466 , EN10210 ,EN10219 


Steel Grade:
GB/T6728:2002 : Q195 , Q235 , Q345
ASTM A500:GR. A , GR. B, GR. C , GR. D
JIS G3466 : SS440,SS540
EN10210, EN10219: S235JR ,S275JR,S355JR, S355J2H


Size: 

Name
SizeWall Thickness Length
mmmmm
Square tube10x10-500x500
0.6-25.01-12m
Rectangular tube20x10-200x4000.7-13.01-12m



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