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How to determine whether the stainless steel seamless tube is annealed process?

How to determine whether the stainless steel seamless tube is annealed process?

Time:2022-03-18 Source:China Wuxi JiaNuo Special Steel Co.

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Stainless steel seamless pipe in the construction of the annealing process is a very important step, good annealing process to ensure its good performance, so how do we determine whether the stainless steel seamless pipe is annealed process?

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1, the pipe can be judged by the echo.

Knock on each tube and listen to the echo at the mouth of the tube. If the echo is higher and sharper, it is already annealed. Because the internal crystal organization of annealed parts is more uniform and dense, it can produce a high tone echo. And not annealed parts due to more organizational defects, can absorb part of the acoustic energy, so the sound tone at the mouth of the tube is lower, muffled some. If the conditions can be used to detect sonar.

2, using a digital multimeter with good accuracy, measure the resistance of each pipe unit length (such as 2 meters).

The resistance of seamless stainless steel pipe is large and should be measurable, and the resistance of annealed steel parts is smaller than that without annealing. All should be wiped dry and free of liquid before measurement.

Therefore, whether the stainless steel seamless pipe is annealed process can be judged by these methods to ensure the purchase of quality products.