A513 Carbon Steel Square Tubing

 

A513 square tube is an American standard hot-rolled, resistance-welded mechanical tube. It is the most economical material for construction, being both inexpensive and durable. It is widely used in commercial and residential real estate projects.

A513 Square Steel Tube Specification

Standard	ASTM A513
Material	16Mn,A106,A36,A210,ST35 St35.4 St35.8 St37 St37-2 ST37.4 St42 St42-2 St45 St45-4 St45-8 St52
Size	15mm*15mm-500mm×500mm
Wall Thickness	1mm-30mm
Length	Single Random Length and double Random Length
Surface Treatment	black paint, varnish, Oil, galvanized
Certificates	ISO 9001:2008,SGS, etc
Packaging	Packaged in bundles(2Ton Max); bundled pipes with two slings at the both end for easy loading and discharging; wooden cases; waterproof woven bag.

A513 Structural Tube

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Methods for detecting surface defects in A513 rectangular tubes mainly include the following five techniques:

1. Eddy Current Testing
There are various forms of eddy current testing, commonly including conventional eddy current testing, remote field eddy current testing, multi-frequency eddy current testing, and pulsed eddy current testing. Eddy current sensors induce currents in the metal, and different defect types and shapes on the surface of the rectangular tube generate different signals. The advantages are high detection accuracy, high sensitivity, fast detection speed, and the ability to detect both the surface and subsurface of the A513 rectangular tube, unaffected by surface contaminants like oil. The disadvantages are a high false detection rate, as non-defect structures can be misinterpreted as defects, and the difficulty in adjusting detection resolution.

2. Ultrasonic Testing
When ultrasonic waves enter the material and encounter a defect, part of the sound wave is reflected. The transmitter and receiver can analyse the reflected waves to precisely locate defects. Ultrasonic testing is often used for inspecting forgings, with high flaw detection sensitivity. However, it is challenging to inspect complex-shaped tubes and requires a certain surface smoothness of the A513 rectangular tube, along with a coupling agent to fill the gap between the probe and the inspected surface.

3. Magnetic Particle Testing
The principle of magnetic particle testing involves creating a magnetic field within the rectangular tube material. When there are surface or near-surface discontinuities or defects, the magnetic field lines locally distort, creating magnetic poles at these discontinuities. The advantages include low equipment investment, high reliability, and intuitive results. The disadvantages are high operating costs, inability to accurately classify defects, and slower detection speed.

4. Infrared Testing
High-frequency induction coils generate eddy currents on the surface of the rectangular tube. These currents cause defect areas to consume more electrical energy, raising the local temperature. Infrared detection of this temperature rise helps determine defect depth. Infrared testing is typically used for detecting defects on flat surfaces and is not suitable for uneven metal surfaces.

5. Magnetic Flux Leakage Testing
The magnetic flux leakage testing method is very similar to magnetic particle testing but offers a broader application range, higher sensitivity, and greater reliability compared to magnetic particle testing.

Hot Tags: a513 carbon steel square tubing, China a513 carbon steel square tubing manufacturers, suppliers, 2205 Duplex Stainless Steel Tube, ANSI B36 10 B36 19 Stainless Steel Welded Pipe, A691 Alloy Steel EFW Pipe, A335 Alloy Steel Pipes, JIS A5525 Spiral Welded Pipe, A333 Gr6 Gr9 ERW Tubes