Mild Steel Square Tube Galvanised-Complete Guide to ...

1. The identification method for rectangular tubes is fake and inferior, and rectangular tubes are prone to folding. Folding is a variety of creases formed on the surface of rectangular tubes, which often run through the longitudinal direction of the entire product. The reason for folding is due to the pursuit of high efficiency by fake and inferior manufacturers, which results in excessive reduction and the generation of ears. Folding occurs during the next rolling process, and the folded product will crack after bending, resulting in a significant decrease in the strength of the steel.

If you want to learn more, please visit our website.

2. The identification method for rectangular tubes is that there are often pitted surfaces on the surface of the tubes. Pitted surface is a defect caused by severe wear and tear on the rolling groove, resulting in irregular unevenness on the steel surface. Due to the pursuit of profit by manufacturers of fake and inferior rectangular pipes, rolling grooves often exceeds the standard.

3. The identification method for rectangular tubes is that the surface of fake and inferior rectangular tubes is prone to scarring. There are two reasons:

(1) The material of fake and inferior rectangular tubes is uneven and there are many impurities.

(2) . The guide and guard equipment of counterfeit manufacturers is simple and easy to stick steel, and these impurities can cause scarring on the surface of galvanized square tubes.

4. The identification method for rectangular pipes is that the surface of fake and inferior materials is prone to cracks because its billet is made of adobe, which has many pores. During the cooling process, the adobe undergoes cracks due to thermal stress, and after rolling, there are cracks.

5. The identification method for rectangular pipes is that fake and inferior rectangular pipes are prone to scratches, as the equipment of the manufacturer of fake and inferior rectangular pipes is simple and easy to produce burrs, which can scratch the surface of the steel. Deep scratches reduce the strength of steel.

Link to Hongyuan International

6. The identification method for rectangular tubes is fake or inferior. The rectangular tube has no metallic luster and appears light red. There are two reasons why it is made of adobe. The rolling temperature of fake and inferior materials is not standard, and their steel temperature is visually measured, which makes it impossible to roll according to the specified austenite area, and the performance of the steel cannot meet the standard.

7. The identification method for rectangular tubes is that the transverse bars of the tubes are thin and low, often resulting in insufficient filling.

8. The identification method for rectangular pipes is that the cross-section of the fake and inferior rectangular pipes is elliptical. The reason is that the manufacturer, in order to save materials, has a large reduction in the first two passes of the finished product roll, which greatly reduces the strength of this square pipe and does not meet the standards for the external dimensions of galvanized square pipes.

9. The identification methods for rectangular pipes include uniform composition of high-quality steel, high tonnage of cold shear machines, smooth and neat cutting end faces, while fake and inferior materials often have meat shedding on cutting end faces due to poor material quality, which is uneven and lacks metallic luster. Moreover, due to the limited cutting of the manufacturer's products, large ears may appear at the head and tail.

Local suppliers or scrap yards. I pay roughly 60% of online prices, before shipping, by going to my local metal yard. This is for new metal, all scrap comes in at $0.50/lb which works out pretty well for most of it. I did like the $0.25/lb that I paid a couple years back a bit better tho hah.

Just to quote a price I know off of the top of my head due to using it recently:
$0.81/ft for 1/8 by 1 by 1 angle iron, 20ft. OnlineMetals wants $1./ft and max 8ft bar, or for a 20ft, $1.92/ft or $38.40!! Nuts. I can't imagine shipping on that either, and its -way- easier to use 20ft's than short sticks.

For more information, please visit Galvanized Square Tube.