Rare 440C steel defect?

[Wanimator]

I only tried sanding it to see if I could smooth out some of the scratches. I used 600-2000 grit wet paper. Camera flash exaggerates the marks.
Do you mind if I ask why you wouldn't have sanded it?

Just because I don't like removing material if I don't have to. Doesn't fix anything.

 

[Haebbie]

Just because I don't like removing material if I don't have to. Doesn't fix anything.

If you don't do anything against the rust pits the corrosion is going on.
In every time the blade gets wet the rust is getting new food. And you always can see a small pit.
The corrosion works under the surface. And the cave is getting bigger and bigger. Typical for 425m.

Haebbie

 

[Wanimator]

If you don't do anything against the rust pits the corrosion is going on.
In every time the blade gets wet the rust is getting new food. And you always can see a small pit.
The corrosion works under the surface. And the cave is getting bigger and bigger. Typical for 425m.

Haebbie

Thank you for the information. I didn't know that.

 

[Wanimator]

If you don't do anything against the rust pits the corrosion is going on.
In every time the blade gets wet the rust is getting new food. And you always can see a small pit.
The corrosion works under the surface. And the cave is getting bigger and bigger. Typical for 425m.

Haebbie

Thank you for the information. I didn't know that.

 

[Frotier76]

yes this is typical for 425m but it also happens to 440c which this two liner is
I have several 440c blades that show this
I think it is flaws/impurities in the steal
425m was more resist to salt but it did have a lot of trash in it
that is why buck went to 440hc as I under stood it

I thought Buck went to 420HC because Cyclops Steelworks was the one company in the USA that made 425M and when they went belly up in 1992/1993...Buck went to Latrobe for their 420HC.

 

[VorpalRain]

Buck went to 420HC because they were the only ones who wanted 425M and it was more expensive as a special order. Since 420HC was available off the shelf at a far better price it was a no-brainer to switch.