GB/T6728-2002 (China) Cold Formed Structural Hollow Section Steel Pipe for Building

GB/T6728-2002 (China) Cold Formed Structural Hollow Section Steel Pipe for Building

OD:21-630mm
Wall thickness:3-40mm
Pipe Length: from 6 to 12 m.
Different lengths on request.
Pipe Ends: plain square-cut or bevelled ends for butt-welding.
Surface Conditions: black (bare).
Coatings are available on reques
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Product Details

All employees of our company will continue to work hard and promise to our customers that we will bring you premium S355 Seamless Carbon Steel Tube, API5L X42 Pipe, Hot Rolled Steel Pipe and economic benefits with safe and reliable quality and preferential prices. In our unremitting efforts, we insist on providing high-quality products, a general price strategy and the business philosophy of providing safe and reliable products to meet customer requirements. We have established a good reputation of high quality, low price and good service.

Cold Formed Welded Structural Hollow Sections are formed at ambient temperatures and are produced in accordance with standard EN 10219-1: 2006. There are more and more manufacturers of cold-formed hollow sections, which makes their products more widely used. In Germany, hot-worked structural hollow profile (HFSHS) products are usually 24% to 54% more expensive than cold-formed products.

1.OD:21-630mm

2.Wall thickness:3-40mm

3.Pipe Length: from 6 to 12 m.Different lengths on request.

4.Pipe Ends: plain square-cut or bevelled ends for butt-welding.

5.Surface Conditions: black (bare).Coatings are available on request

1.Mechanical Properties 

 

Steel grade

Thickness
(mm)

Yield strength
(N/mm²)

Tensile strength
(N/mm²)

Elongation(%)

Test temperature
(°C)

Impact value
(J)

S235JRH

6≤t≤16

235≤

360–510

24≤

20

27≤

16<t≤22

225≤

S275J0H

6≤t≤16

275≤

410–560

20≤

0

27≤

16<t≤22

265≤

S275J2H

6≤t≤16

275≤

410–560

20≤

-20

27≤

16<t≤22

265≤

S355J0H

6≤t≤16

355≤

470–630

20≤

0

27≤

16<t≤22

345≤

S355J2H

6≤t≤16

355≤

470–630

20≤

-20

27≤

16<t≤22

345≤

S355K2H

6≤t≤16

355≤

470–630

20≤

-20

40≤

16<t≤22

345≤

2. Chemical Composition 

Unit: %

Steel grade

Thickness
(mm)

C

Si

Mn

P

S

N

CEV

S235JRH

6≤t≤22

≤0.17

-

≤1.40

≤0.040

≤0.040

≤0.009

≤0.35

S275J0H

6≤t≤22

≤0.20

-

≤1.50

≤0.035

≤0.035

≤0.009

≤0.40

S275J2H

6≤t≤22

≤0.20

-

≤1.50

≤0.030

≤0.030

-

≤0.40

S355J0H

6≤t≤22

≤0.22

≤0.55

≤1.60

≤0.035

≤0.035

≤0.009

≤0.45

S355J2H

6≤t≤22

≤0.22

≤0.55

≤1.60

≤0.030

≤0.030

-

≤0.45

S355K2H

6≤t≤22

≤0.22

≤0.55

≤1.60

≤0.030

≤0.030

-

≤0.45

Cold Formed Welded Structural Hollow Sections have high mechanical resistance and yield strength. They are used as fixed load-bearing structures in construction and civil engineering. Due to their static characteristics, they are applicable components in mechanical engineering. They are also used in the aerospace and automotive industries. They are not suitable for dynamic loads.

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We are willing to cooperate with colleagues at home and abroad to make contributions to the development of GB/T6728-2002 (China) Cold Formed Structural Hollow Section Steel Pipe for Building for the industry. Our company constantly introduces advanced products and technologies, accumulates abundant talents and technical resources and develops the core technology of the enterprise and cultivates the core competence. We are willing to achieve greater brilliance and progress with full of passion, standardized operation and management.
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