We specialized in manufacturing the full size of square tubes and rectangular tubes:20X20-600X600mm,square tubes,20X30-600X800mm rectangular tubes,for more than 20 years since 1997.

galvanized square pipe/round pipes/rectangle steel pipe and tubes Product Description:

Chemical Composition: 

Carbon Equivalent:

Ceq(%)=C+Mn/6+Si/24 +Ni/40+Cr/5+Mo/4+V/14

I grade product Ceq(%)

Note: In order to improve the performance of steel,390 could add the microelement 

such as V, Nb, Ti, Mo and N etc.

Mechanical Property: 

Surface Qualty:

1.Cold bending section steel surface can not have bubbles,cracks,inclusions and transverse stratification,wrinkle,buckle and so on. Allow slight pit,convex,indentation,scratch and presure into the iron oxide,but is not greater than 10% of nominal wall thickness.

2.Surface defects allowed use grinding method to clear up,but after cleaning the thickness should be no less than minimum allowable thickness.

3.If have special requriements on surface quality of cold bending section steel ,determined by supply and demand.

Welding Quality:

1.Welds of cold bending section steel shall not be skip welding,lap welding and burn through.

2.Weld flaw allowed repair welding and grinding,but  after welding and griding shold reach requirements specified in this standard.

3. Burrs around welding should be removed, burrs inside seams do not clear up,when have special request determined by supply and demand.

galvanized square pipe/round pipes/rectangle steel pipe and tubes Product Photo Show:

Packaging:

Shipping:

galvanized square pipe/round pipes/rectangle steel pipe and tubes Product Application:

Company Introduction :

Our company focuses on the usage, development and research of square and rectangular tubes over the passed 20 years. We purchased three production lines at the cost of over 16 million for expansion of the new factory in 2012, These production lines make full-sizes of square tubes and rectangular tubes: 20x20mm-600x600mm, 20x30mm-600x800mm, Thickness:1.0mm-35.0mm,over 2800 kinds of specifications.

Factory show:

Our company have passed ISO9001:2008 quality management system certification and have passed Europe Union EN10210-1:2006 ,10219-1:2006 CE certification in 2012.

Company resorts more variety,large inventory,high quality,low price,short delivery time,good after-sales service and many other competitive advantages,to become designated supplier of many large enterprises.Customers throughout our country in more than 20 provinces and cities and exported to the United States,Canada,Russia, India,Malaysia,Europe and other countries and regions.

1.customized design is available.

2.Provide free samples.

3.Reply your enquiry within 24 working hours.

4.welcom to visit our factory

5.during the using our products,our customer service staff can answer any answer any question about the quality and technology.

In order to make best quotation, Please kindly indicate length, width, thickness and the standard, material you required.

If you want to konw more information,please do not hesitate to contact me . 

Thanks

JUDY