Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

black carbon steel square pipe


1.Manufacture Large Diameter Carbon steel ERW Welded Black Square Pipe

1)Surfacte: can be Galvanized,Bared Or Painted

2)Gal method: hot dipped or pre-galvanized

3)OD:15*15-600*600mm

4)Standard: ASTM A500 EN10219 JIS G3466 GB3094 GB-6728

black carbon steel square pipe

 

BLACK SQUARE WELD PIPES

:specification

1) Outer Diameter:

square 15*15-400*400mm b)rectangular 20*25-300*500mm

2) Wall thickness:0.5mm-13mm

3) Length:1-5.8/6/12m or nonstandard

4) Standard: GB3091, ASTM A53, BS1387

7)Tolerence of OD: +0.05mm

8)Payment:T/T L/C at sight

9) Application: Structure building , car chassis , shipbuilding , decoration , etc.

 

10) MOQ: At least 20 tons

 

 

: material

Grade

C

Mn

Si

S

P

UTS(MPa)

YS(MPa)

EI(%)

Q235B

0.12-0.20

0.30-0.70

0.30

0.045

0.045

375-500

235

26

Q345B

0.12-0.20

1.20-1.60

0.20-0.55

≤0.045

≤0.045

510-600

345

22

20#(GB)

0.17-0.23

0.38-0.65

0.17-0.37

≤0.030

≤0.030

410-550

≥245

≥20

 

 

Square steel pipe (mm )

Rectangular steel pipe (mm)

OD

WT

OD

WT

OD

WT

OD

WT

15*15

0.6--1.5

120*120

1.7—5.75

20*(25—50)

1.5-2.75

100*(150-300)

1.5-10

20*20

0.6—2.5

125*125

2.75-5.75

25*(40—50)

0.8-2.75

110*(110-140)

4.0-5.75

25*25

0.6—3.0

130*130

4.0—5.75

30*(40—60)

0.6-3.75

120*(140-160)

3.0-7.5

30*30

0.6—4.0

140*140

2.75-5.75

40*(50—150)

1.0-6.0

130*(160-200)

5.0-7.5

40*40

0.7—5.0

150*150

2.5-9.75

50*(70—150)

0.8-6.0

150*(200-300)

3.0-12

50*50

0.7—5.75

160*160

3.0-9.75

60*(80—180)

1.7-5.75

160*(160-250)

3.0-12

60*60

0.7—5.75

180*180

3.0-9.75

70*(120—200)

2.0-6.0

180*(250-350)

4.0-12

70*70

1.0—5.75

200*200

3.5-11.75

80*(100—200)

2.0-7.75

200*(250-400)

5.0-12

75*75

1.3—5.75

250*250

3.75-11.75

90*(140—180)

3.0-4.75

220*220

5.0-12

80*80

1.3—5.75

300*300

4.75-11.75

The above is our popular size

90*90

1.5—5.75

350*350

7.75-11.75

We also can meet your other requirements.

100*100

1.2—5.75

400*400

7.75-11.75

Black pipe are usually with anti-rust or black painting on surface

 

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