Planer blades, sharpen them or replace them?

[jteneyck]

Not sure what all this means, but, this is the response from the seller wrt the planer blade material (3 blade set for 15" planer, $25 delivered, plus tax):
M2/SKH51/W12Mo5Cr4V2 Hardness: HRC 63-65 degrees
Don't know if I purchased junk or got lucky...time will tell...

That says you bought M2 / SKH51 steel.  I think they are interchangeable, but I'm not sure.  W12Mo5Cr4V2 means 12% tungsten, 5% molybdenum, 4% chrome, and 2% vanadium.  HRC 63 - 65 means the hardness is 63 - 65 on the Rockwell C scale.  The tungsten content seems about 2X what M2 typically, is.  Other than that it looks the same.  It should be good stuff with that much tungsten.  

John

[brianwelch]

Thanks...seemed to be consistent with many other blades being sold by Grizzly, Delta, etc...