Roads and bridges material retangular and square steel pipe

 Roads and bridges material retangular and square steel pipe

A: We are factory, our main products include square and rectangular Steel pipe.  Our products of large-diameter, thick-walled square or rectangular tubes fill the blank of domestic and abroad market.

Q: What is the Export Volume of your company?

A: We have a 200000 tons export volume per year in the past, with the expansion of the markets, the Export Volume is growing steady.

Q: Why choose our company?

A: We have passed ISO9001:2008 quality management system certification and have passed Europe Union EN10210-1:2006 CE certification in 2012.Compay 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.

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 Quality:

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 pressure 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 requirements 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 girding should 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.

Product photos

 

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.

Contact us

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

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

Thanks

Ruby