s30v/ CPM-s30v questions
- Thread starter John79
- Start date
- Status
Valkman
Member
On the last question, any CPM version of a steel is a powdered, more pure version that is pressed to make steel. It has a more uniform grain structure and should out-perform the non-CPM version.
Where'd you hear that?
CPM-S30V rc's from 55 to 61 for knife applications.
bikerdoc
Moderator In Memoriam
Nope.
Got a Native in S30V. Very hard. Good EDC. Once sharp, only needs infrequent touch ups.
Hans Esker
Member
That rumor does have a grain of truth: Previously Spyderco used CPM 440V, later renamed CPM S60V, in some knives. In theory it showed great promise as a cutlery steel.
Almost every steel used in knives (including CPM S60V) is a "hand me down" from other applications.
CPM S60V could not be hardened to the level of traditional cutlery steels and still have acceptable chip resistance. Thus Spyderco heat treated CPM S60V to several hardness points lower than contemporary designs.
Partly because of this, Spyderco, along with others in the knife industry were directly involved with Crucible Steels (developer and maker of CPM steels) in the development process to create a CPM Steel specifically for use in cutlery. The result was CPM S30V, which had higher toughness (resulting in higher practical hardness without chipping), which Spyderco heat treated to normal levels of hardness, and easier sharpenablity than CPM S60V.
Almost every steel used in knives (including CPM S60V) is a "hand me down" from other applications.
CPM S60V could not be hardened to the level of traditional cutlery steels and still have acceptable chip resistance. Thus Spyderco heat treated CPM S60V to several hardness points lower than contemporary designs.
Partly because of this, Spyderco, along with others in the knife industry were directly involved with Crucible Steels (developer and maker of CPM steels) in the development process to create a CPM Steel specifically for use in cutlery. The result was CPM S30V, which had higher toughness (resulting in higher practical hardness without chipping), which Spyderco heat treated to normal levels of hardness, and easier sharpenablity than CPM S60V.
s30v is a trademarked name, so it is always made by crucible, its just a shortened form of cpm s30v.
s30v was developed by crucible in 2003. the 'cpm' stands for crucible particle metallurgy, and is a method they own for homogenizing the alloys together. They say it gives superior dimensional stability, grindability and toughness.
Chris Reeve initially approached Dick Barber of Crucible to develop a steel for knives. Barber got feedback from Sal Glesser, Ernest Emerson, Tony Marfione, Phil Wilson, William Harsey Jr., Tom Mayo, Jerry Hossom, and Paul Bos in the development of CPM S30V.
All the V's (s90v, 10v, 15v, etc), all the REX's (REX 20, REX 45, etc), and a bunch more are all trademarked by crucible.
For another company to produce this steel they would have to call it something else. Like [FONT=arial, helvetica]0170-6 & 50100-B--they are the same steel. But without the CPM process it would still be a somewhat different steel. Crucible has been pioneering steel since 1905 when they patented the use of vanadium in tool steel.
[/FONT]
s30v was developed by crucible in 2003. the 'cpm' stands for crucible particle metallurgy, and is a method they own for homogenizing the alloys together. They say it gives superior dimensional stability, grindability and toughness.
Chris Reeve initially approached Dick Barber of Crucible to develop a steel for knives. Barber got feedback from Sal Glesser, Ernest Emerson, Tony Marfione, Phil Wilson, William Harsey Jr., Tom Mayo, Jerry Hossom, and Paul Bos in the development of CPM S30V.
All the V's (s90v, 10v, 15v, etc), all the REX's (REX 20, REX 45, etc), and a bunch more are all trademarked by crucible.
For another company to produce this steel they would have to call it something else. Like [FONT=arial, helvetica]0170-6 & 50100-B--they are the same steel. But without the CPM process it would still be a somewhat different steel. Crucible has been pioneering steel since 1905 when they patented the use of vanadium in tool steel.
[/FONT]
- Status
