what is 4/30 German stainless?

S

storyville

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Aug 11, 1999
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In response to an inquiry, the Canadian mfr Grohmann Knives notes that it uses "4/30 hi-carbon German stainless steel" in its kitchen cutlery (but that the % of its carbon content and alloying elements is a "trade secret," yadda yadda). The co's literature also notes that it is a "chromium-molybdenum-vanadium" steel.

Is there an equivalent steel to German 4/30 which is more familiar in North America (e.g., US or Japanese-produced)? I posted this Q in Shoptalk but it didn't ring a bell there... perhaps some of our European members in the Gen Forum can help out?

I suspect that it's similar to AUS8A (which has a minimal amt of Vanadium, 0.1-0.25%), but this is sheer speculation.

(More generally, why are most kitchen steels "proprietary" or shrouded as a "trade secret" -- far more routinely than one encounters amongst "sport utility" knife mfrs?)

Curious...
Glen
 
Two or three years ago, I visited Grohman in Nova Scotia and was informed that the steel had .75% carbon and was equivalent to AUS8, as you suspected.The steel is pretty good and holds an edge about the same length as other AUS8 blades I have
 
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