Black Hollow Section Carbon Steel Q235 Square Tube

Square hollow sections or square tubes are cold formed and welded from either hot rolled, cold rolled, pre-galvanized or stainless steel.

In order to form the square steel section the appropriate mother tube, a round steel tube, has to be formed first. From a round tube rolls are used that progressively press the round tube into a square hollow section. This is all done inline.
Square and rectangular steel tubes have the advantage of being stronger in bending while a round hollow sections has more stiffness in twisting.

Size	Outer Diameter	10*10mm~2000*2000mm Other sizes can be customized
	Wall Thickness	0.5mm~60mm Other sizes can be customized
	Length	Common length 5.8m, 6m, 11.8m, 12m Less Than 12m sizes can be customized
Standard	GB/T3094 – Cold drawn shaped steel tube ASTM – A500 -Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes BS1387, BS3601, BS EN39 JIS G3444, JIS G3452, JIS G 3454 EN10219 EN10217
Material	Q195, Q215, Q235, Q345, 16Mn, 10#, 20#, 30#, 45#; A36, SS400 ASTM A53 Grade A, Grade B; ASTM A252 Grade 1, Grade 2, Grade 3
Ends Protector	Plastic pipe cap, Iron protector
Technique	ERW
Surface Treatment	Black painting, oiled,painted,galvanized
Section Shape	Square
Package	Bundle, In Bulk, Bags, Clients’ Request
Port	Xingang Port,Tianjin, China
Date of Delivery	According To The Quantity And Specification Of Each Order
Payment	L/C, T/T, Western Union, Alibaba Trade Assurance

Some size of black hollow section carbon steel Q235 square tube

SIZE

MM

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10X10

12X12

13X13

15X15

16X16

19X19

20X20

25X25

30X30

35X35

38X38

40X40

42X42

45X45

48X48

50X50

55X55

60X60

65X65

70X70

75X75

80X80

85X85

89X89

90X90

95X95

100X100

105X105

110X110

115X115

120X120

125X125

130X130

135X35

140X140

150X150

160X160

170X170

180X180

200X200

220X220

250X250

280X280

300X300

350X350

400X400

420X420

450X450

500X500

520X520

550X550

600X600

Production process of black hollow section carbon steel Q235 square tube:

4.Package of black hollow section carbon steel Q235 square tube: Packing by plastic bags,bundled by steel strip,or as your demand

5.Delivery Time:

1).The products in stock will delivery immediately received the deposit

2).According to the order quantity, the delivery time range from five days to twenty  days.

6.Trade Terms:EX-Work,FOB,CFR,CIF,

7.Payment Term:T/T or L/C

8.shipment:By container or bulk vessel

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