Older Sandvik scraper. Can't raise a burr

[EricU]

I was having trouble raising a burr on any of my scrapers so I got a Union Accu-burr.  It works great on all of my scrapers other than the sandvik.  Now I'm wondering if they understood the assignment, it must be hardened. There are so many posts about how to raise a burr that any info about this scraper is lost in the noise.  Anyone have a scraper like that?

[AHill]

Please describe your method for turning a burr. That will help us diagnose your problem.

Unless you say something different, it could very well be you've exhausted the number of burrs you can turn. I recommend re-establishing a flat edge by sanding and polishing the edge before re-attempting to turn a burr. You really don't want a hardened edge. Scrapers are hardened to about the same hardness as a saw blade (like 50 Rockwell C max - many are as low as 40 Rc). Too hard an edge, and you either can't turn a burr, or it will break off too easily.