How to distinguish Cr5Mo from carbon steel
Thread Content
In what ways can Cr5Mo and carbon steel be distinguished to determine which one is Cr5Mo? Which one is carbon steel?
Regarding pipelines: 1. CR5MO to be painted blue； Carbon steel does not require painting. 2. An experienced welder can have different sensations when performing welding and cutting; the feel of cutting varies, so it’s a good idea to find a competent welder to give it a try. 3. Conduct element content testing
2# lonelyghost_li: For the Cr5Mo pipes, only the elbows are painted blue; the rest of the pipes are black. It’s hard to tell if they have been used or not. Is there any simple way to distinguish them?
Grinding the edge with a grinder: continuous sparks indicate carbon steel, while discontinuous sparks indicate Cr5Mo
Looking at the spectrum analysis takes just a few seconds.