If you can edit the heading it is not Shatter, it's Chatter. It depends on if you are hand scraping or power scraping. Steel is a very difficult material to scrape either way. If I am hand scraping soft steel gibs by hand I use the same neg 5 degree blade I use for scraping cast iron. If i am power scraping it with a BIAX I use a 12 to 30 positive blade tip and the deg varies on how soft the material is. Also use short strokes and if your scraping by hand use the lift out at the end of the stroke. As the steel will burr up real bad, also use a slow motor RPM. Wear leather gloves when cleaning up as you will get slivers if your not careful. Also use a smooth cut file to debur it and a file card to clean the file before stoning it with a med grit Indian stone. Brush off the chips with a paint brush, Not so much a rag as it will catch and pull off threads of cloth.
I get chatter scraping steel, so don't feel bad. When scraping Iron I say scrape the checkerboard pattern x x x patterns, but in steel cute the part in different degrees or patterns and not just 90 deg's to eliminate the chatter. Thanks Jan for the plug....lol Rich