The answer is "yes". Lots of Chinese brands have been tested via XRF to confirm steel stamps. Some have also been tested for hardness. Generally, the major brands can be trusted. Here is a spreadsheet with results:
Sheet1 Less Than Range,Within Range,Above Range,✓ Steel Match,X No Match,LOD Limit of Detection Rockwell Hardness ,Steel Type,Ti Grade,Test Date,Steel Element Breakdown,Element information provided by: InterestingEngineering.com Steel,HRC,Brand,Model,Rockwell Advertised,Aimed Hardness,Rockwell T...
docs.google.com
Unfortunately, there are issues with performance. Even with decent hardness, Chinese D2 does tend to vary and often falls short of the reputation that helped it to become popular. There has been a lot of discussion as to why this is. Between other people doing cut testing and my own experiences, I feel like Chinese D2 can be a good replacement for 8Cr13Mov at the right price. For instance, Petrified Fish gets one of the better heat treatments and has some decent knives around $30-40.
Otherwise, there are better choices. For instance, more Chinese companies are now importing 14C28N. It tends to perform well and that might have to do with ease of getting a good heat treatment. Another alternative is 9Cr18Mov. While normally a decent budget steel, WE has perfected the heat treatment for it. It's sort of like the difference between regular 420HC and Buck's 420HC with the Bos heat treatment, but from a better starting point. As a result, the Civivi and Sencut knives in 9Cr18Mov get surprisingly good edge retention.