Magnacut 64hrc vs S45vn 61hrc

[gamma_nyc]

Which has better abrasion resistance?

I’ve asked Grok and he seems to only find comparisons of s45vn to magnacut) at lower hardness). In that scenario he gives s45vn a higher abrasion resistance than magnacut.

Does the 64hrc version of magnacut out last s45vn in abrasion resistance?

 

[argyle1812]

Yes by a long shot

 

[SCTorrero]

Which has better abrasion resistance?

I’ve asked Grok and he seems to only find comparisons of s45vn to magnacut) at lower hardness). In that scenario he gives s45vn a higher abrasion resistance than magnacut.

Does the 64hrc version of magnacut out last s45vn in abrasion resistance?

With the specified HRC and all else being equal, about the same. You can check Larrin's chart in the link below.

Magnacut is going to be "tougher" though, which likely means more edge stability (less chips and rolls).

CPM MagnaCut - The Next Breakthrough in Knife Steel - Knife Steel Nerds

CPM MagnaCut is a new stainless knife steel designed to be better than anything that has been available before. Is it a success?

knifesteelnerds.com

 

[gamma_nyc]

With the specified HRC and all else being equal, about the same. You can check Larrin's chart in the link below.

Magnacut is going to be "tougher" though, which likely means more edge stability (less chips and rolls).

CPM MagnaCut - The Next Breakthrough in Knife Steel - Knife Steel Nerds

CPM MagnaCut is a new stainless knife steel designed to be better than anything that has been available before. Is it a success?

knifesteelnerds.com

Very informative thank you!

 

[knarfeng]

With the specified HRC and all else being equal, about the same. You can check Larrin's chart in the link below.

Magnacut is going to be "tougher" though, which likely means more edge stability (less chips and rolls).

CPM MagnaCut - The Next Breakthrough in Knife Steel - Knife Steel Nerds

CPM MagnaCut is a new stainless knife steel designed to be better than anything that has been available before. Is it a success?

knifesteelnerds.com

"improved edge stability" means less chipping due to carbides being ripped out of the edge.
Edge instability is the phenomenon of carbides ripping out of the matrix. The carbides in Magnacut are smaller than those in S45VN and are therefore harder to damage or rip out of the matrix. That provides better edge stability for Magnacut.

"Edge Rolling" is due to soft steel, not edge instability. The higher hardness Magnacut will give you less edge rolling because the steel is "stiffer".

"Improved toughness" means the steel matrix holding the carbides is less prone to cracking.

You get to the same answer for the comparison of those two alloys, but the actual reasons are a bit different.

 

[SCTorrero]

"improved edge stability" means less chipping due to carbides being ripped out of the edge.
Edge instability is the phenomenon of carbides ripping out of the matrix. The carbides in Magnacut are smaller than those in S45VN and are therefore harder to damage or rip out of the matrix. That provides better edge stability for Magnacut.

"Edge Rolling" is due to soft steel, not edge instability. The higher hardness Magnacut will give you less edge rolling because the steel is "stiffer".

"Improved toughness" means the steel matrix holding the carbides is less prone to cracking.

You get to the same answer for the comparison of those two alloys, but the actual reasons are a bit different.

Excellent info. Thank you. I was using "edge stability" colloquially. Meaning, the stability of the geometry at the edge without regard to the reasons for that stability. I didn't realize it was a term of art.

 

[gamma_nyc]

"improved edge stability" means less chipping due to carbides being ripped out of the edge.
Edge instability is the phenomenon of carbides ripping out of the matrix. The carbides in Magnacut are smaller than those in S45VN and are therefore harder to damage or rip out of the matrix. That provides better edge stability for Magnacut.

"Edge Rolling" is due to soft steel, not edge instability. The higher hardness Magnacut will give you less edge rolling because the steel is "stiffer".

"Improved toughness" means the steel matrix holding the carbides is less prone to cracking.

You get to the same answer for the comparison of those two alloys, but the actual reasons are a bit different.

Great information clearly articulated. You are a bladeforums gem.

 

[kreole]

I have a couple magnacut blades in the 64-65 hrc range. It definitely holds a fine edge longer. I wouldn't say working edge lasts longer though, but how you feel about it will depend on your own cutoff between still sharp enough and dull. The higher hardness is nice of you favor fine edge. I'd take s45vn for more cutting between sharpening.