Metallic Composition

It's an alloy based on whatever the other 81% happens to be.
Del
(If the 81% is pastry, then it's a rather toxic pie crust)

It's for a BOT and they like theirs crunchy

That adds up to 19.0%; what does the remaining 81.0% consist of?

He should have a thought for Pareto's law 20% input makes 80% of results. And 80% input have only 20% influence on output.

Maybe a 300 series corrosion resistant steel.

If the analysis is a product analysis, (not a producer test report) it could be martensitic stainless no.5F (presuming that the chromium analysis is off a tad!) .

It is most likely one of the 440 s- 440A,B,C,F or 430 F or 430 F with Selenium, 434, 436,442 given their 1.00 or 1.25 MAX manganese and allowing the 0.50 Ni to be an allowable 'residual;' or it could be precipitation hardening custom 630 again relying on product analysis of 1.00 max Mn, and 17.50 Cr being called 18, and 0.50 Nickel= residual.

IT IS NOT A TOOL STEEL- THE HIGH CHROME TOOL STEELS ARE 12.MAX CHROME.

oops, sorry for the caps lock.

With out the carbon analysis, one is clueless in the world of steels. When one knows Carbon, all will be made clear(er).

My guess is you had a knife blade analyzed and it was 440C.

MILO