Need information on my Wakizashi Steel type

[Datura Dreamer]

On my Wakizashi I got from a friend, it's marking on the blade are worn down pretty far, I can post pics later.

Anyways it says clearly
BK 1602
Carbon Steel
Handcrafted in China

Just like that. I try googling BK 1602 and don't find shit on it. But from other things I've seen is this sword really 6.02% Carbon Steel? That's an insanely high amount of Carbon isn't it? Or is it something else.

 

[horseclover]

The BK 1602 probably has nothing to do with the steel type. It might be a Bud K model number.