| 摘要 |
<p>A martensitic stainless steel pipe wherein it has a chemical composition in which the contents of C, Si, Mn and Cr are respectively limited to specific ranges, and wherein the scale formed on the outer surface of the pipe has a porosity in a specific range depending on the thickness thereof. The steel pipe can exhibit an improved accuracy in the detection of defects by a non-destructive inspection such as ultrasonic flaw detection, which results in the improved efficiency in the non-destructive inspection, and is also advantageous in that it has improved atmosphere corrosion resistance. Accordingly, the above steel pipe and a method for production thereof can be suitably utilized in all the applications wherein use is made of a martensitic stainless steel pipe having a chemical composition equivalent to the above.</p> |
