Ach, I was going too fast. You are correct on the tolerance of course. But still, even with a tolerance of ± 0.2% for the Chinese and ±0.15% for 440C, the 9Cr13MoV is at the low half of the 440C spec for carbon content.
alloy__________carbon range
440C________0.95% to 1.2%
9Cr13MoV____0.7% to 1.1%
They still are not equivalent.
I know that the Chinese do not use the term 440C, but my original point was that sometimes you see Chinese-made knives labelled 440C when they aren't really 440C. And the performance of the steel is not the same as 440C. People use these, think that they are using actual 440C, and think that 440C performs like the knife they are using, when actual 440C is better than that.
So, back to my original point. If the Bokers in question are made in mainland China, there is a question as to whether the steel is really 440C or if it is a Chinese steel with somewhat lower properties.
Best,
Frank R