John Deere Mower Blade Steel?

[Willie71]

P.Brewster's link here: https://jdparts.deere.com/partsmkt/document/english/pmac/4382_fb_Lawn_Mower_Blades.htm
The following lines are right at the top of the above linked page. Isn't that a John Deere official site? Auto leaf springs have always been said to be 5160, but isn't there a chance the new leaf springs could have nickel?
- Made from high-carbon, nickel-alloy steel
- Same steel used for automotive leaf springs.

Leaf springs haven’t been 5160 for decades now. They are similar, but they have quite a lot of variability in alloying. They are typically 0.5-0,55%C, with varying amounts of chromium, nickel, silicon, moly, and even boron.

 

[kuraki]

The combined effort put into this thread cost more than an equivalent amount of 1075 with certs.

 

[john april]

lol good point kuraki. you can use any steel you want. i feel if i could not be 100% sure of the type of steel and that proper heat treat was applied, the customer should know this before purchasing the knife.