Hand Tools

Subject:
Re: Burr and Hardness
Response To:
Re: Burr and Hardness ()

Patrick Chase
Which A2 irons? The one in the LN 212?

As I've mentioned a couple times, high[er] alloy steels like A2 can have good wear resistance even at lower hardness because of the presence of super-hard carbides along the edge. One grossly simplified mental model that might help is to think of those carbides as being like the carbide teeth on a circular saw blade.

The catch is that the edge has to degrade a bit before those carbides are exposed enough to "shoulder the load" and prevent further edge wear, hence the old jibe about "holding a crappy edge forever".

One other thing to note here is that edge angle is the single most important determinant of whether carbides will chip out or stay in place and act to prevent wear. The more obtuse the edge the better supported the carbides along the tip will be. That's why higher-alloy steels tend to have higher "critical angles" (minimum edge angle to avoid pathological chipping) than lower-alloy steels. This is also why those Blue Spruce A2 *paring* chisels are insane IMO :-).

Scapers, even hooked/burred ones, are a pretty friendly application for a carbide-rich steel for that reason.

Messages In This Thread

Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Redoing the test
Re: Redoing the test
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
If you're a beginner...
Re: Cap iron setback and shaving thickness
Re: And a quote....
Re: Radius of cambered blade - some #'s *LINK*
Re: Radius of cambered blade - some #'s
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: The other issue...
Re: The other issue...
Re: The other issue...
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Contrariness
Re: Contrariness
Kato and Kawai
Re: Kato and Kawai
Remarkable restraint
Re: Remarkable restraint
Re: Remarkable restraint
Re: Remarkable restraint
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Not really lighting it up
Correction
Re: Correction
Re: Correction *LINK*
Re: Correction
Re: Correction
Re: Correction
Re: Correction
Re: Correction
Re: Correction
This seems pointless
Re: This seems pointless
Maguire
Re: McGuire
The Virtue
Re: Maguire
Re: Maguire
Re: Maguire
Re: Maguire
Re: This seems pointless
Re: This seems pointless
"Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
My apologies
Re: Burr and Hardness
Re: Burr and Hardness
Re: Burr and Hardness
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
The big difference
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: "Planecraft"
Re: This seems pointless
Re: Correction
Re: Correction
Re: Correction
Re: Correction
Re: Correction *LINK*
Re: The most likely
Re: The most likely
Jupiter Cakes
Re: Jupiter Cakes
Re: The most likely
Re: The most likely
Re: The most likely
Re: Correction
Re: Correction
Re: Correction
Re: Correction
Re: Correction *LINK*
Re: YMMV
Re: YMMV
Re: YMMV
Re: Correction
No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Set-back distance and measurebation
Re: Set-back distance and measurebation
swingley thread
Blackburn
Re: Blackburn
Andrew Hunter
Japanese planes
Re: Japanese planes
Re: Japanese planes
Re: Japanese planes
Re: Blackburn
Re: No tear stained defense needed..
Cap iron sharpening
Re: Cap iron sharpening
Re: Cap iron sharpening
Re: Cap iron sharpening
Re: Worn Through
Re: Worn Through
Re:cap iron sharpness and maintenance
Re:cap iron sharpness and maintenance
Re:cap iron sharpness and maintenance
Pictures *PIC*
Cap iron sharpness
Re: Cap iron sharpness
Re: Pictures
Re: Pictures
Re: Pictures
Re: Cap iron sharpening *LINK*
Re: Cap iron sharpening
Cut depth, species, and wear
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Re: No tear stained defense needed..
Simple concept, easy 'splanation
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Tried this again today
Re: Tried this again today
Re: Tried this again today
Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Double Iron vs. Thick Iron
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
Re: Cap iron setback and shaving thickness
planing
Re: planing
Re: planing
Re: planing
Re: planing
Consumables vs skilled labor
Actually, you've fed right into..
Re: Consumables vs skilled labor
Re: Consumables vs skilled labor
Re: Good Work
Re: planing
Re: Cap iron setback and shaving thickness
I knew *PIC*
Re: I recall
By the way, Mark..
Re: By the way, Mark..
Re: By the way, Mark..
© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.

WOODCENTRAL, P.O. BOX 493, SPRINGTOWN, PA 18081