Square tube carbon steel pipe black hollow section carbon steel Q235 square metal tube

Short Description:

Standard:ASTM A53,A500,GB/T3094

Size OD: 10*10-400*400MM


               LENGTH:5.8-6M as usual     


Main use: Structure pipe, Fence/Door pipe,Building, Furniture and so on

Surface:oil, black, varnish, hot dipped galvanized,pre galvanized

Packing: In bundles, with water proof plastic tarpaulin cover. steel tags

Payment: at sight L/C or 30%T/T

Product Detail

Product Tags

Raw Material


Pipe Billet( Hot Rolled, or Con-casting), Mother Pipe


Hot Rolled Steel Coil (HRC) , Cold Rolled Steel Coil (CRC), Pre-pained Galvanized Steel Strip


Square cut, Burr removed


Lightly oiled, Hot dip galvanized, Electro galvanized, Black

Heat Treatment

Bright Annealed, Black Annealed


Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips


Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yieldstrength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection

Mill Test Certificate

EN 10204/3.1B

black paint square tube (6)

black paint square tube (6)

black paint square tube (6)

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