Spyderco Forums

Stuman wrote: ↑

Fri Jun 15, 2018 2:21 pm

I was just looking at crucible steels and I came across the CPM MPL-1 Which looked very very interesting. It has one of the highest carbon contents of any steel and a whaking load of chromium which is up to 24.00% to 24.20% and is obviously to keep the 3.80% carbon in check. It reminds me of ZDP-189 but has a different elemental makeup and I think it would make a fantastic sprintrun contender. What do you guys think ? I’m pritty sure this will give ZDP a run for its money.

CPM MPL-1
C: 3.75-3.80; W: 0.40; V: 9.00-9.10;
Cr: 24.00-24.20; Mo: 3.00; Mn: 0.45-0.50;
P: 0.015; S: 0.015; Si: 0.50

ZDP-189
C: 3.00; W: 0.60; V: 0.10;
Cr: 20.00; Mo: 1.40; Co: ?;
Mn: 0.50; Nb: ?; P: ?;
S: ?; Si: 0.40;

Deadboxhero wrote: ↑

Fri Jun 15, 2018 2:34 pm

Stuman wrote: ↑

Fri Jun 15, 2018 2:21 pm

I was just looking at crucible steels and I came across the CPM MPL-1 Which looked very very interesting. It has one of the highest carbon contents of any steel and a whaking load of chromium which is up to 24.00% to 24.20% and is obviously to keep the 3.80% carbon in check. It reminds me of ZDP-189 but has a different elemental makeup and I think it would make a fantastic sprintrun contender. What do you guys think ? I’m pritty sure this will give ZDP a run for its money.

CPM MPL-1
C: 3.75-3.80; W: 0.40; V: 9.00-9.10;
Cr: 24.00-24.20; Mo: 3.00; Mn: 0.45-0.50;
P: 0.015; S: 0.015; Si: 0.50

ZDP-189
C: 3.00; W: 0.60; V: 0.10;
Cr: 20.00; Mo: 1.40; Co: ?;
Mn: 0.50; Nb: ?; P: ?;
S: ?; Si: 0.40;

Information in link from 2003.

Sounds brittle


http://www.knifenetwork.com/forum/showt ... hp?t=13071

Deadboxhero wrote: ↑

Fri Jun 15, 2018 3:55 pm

The have it available for powder form

Used in Cladding to low alloy steel "Cru-Clad"
Mpl-1 on the outside to prevent wear with a core steel of a more ductile substrate, low alloy, non knife grade, industrial steel.
Boring non knife stuff

They also mentioned difficulty making Mpl-1 into bar stock. Which is understandable if they have problems with rolling s110v, I'd imagine the problems are magnified with this grade.

http://www.nsm-ny.com/index.cfm?fuseact ... page_id=32

Stuman wrote: ↑

Sat Jun 16, 2018 10:20 am

Deadboxhero wrote: ↑

Fri Jun 15, 2018 3:55 pm

The have it available for powder form

Used in Cladding to low alloy steel "Cru-Clad"
Mpl-1 on the outside to prevent wear with a core steel of a more ductile substrate, low alloy, non knife grade, industrial steel.
Boring non knife stuff

They also mentioned difficulty making Mpl-1 into bar stock. Which is understandable if they have problems with rolling s110v, I'd imagine the problems are magnified with this grade.

http://www.nsm-ny.com/index.cfm?fuseact ... page_id=32

I’m pritty sure they could roll it into bar stock relatively easy infact they have, After all they done this with Maxamet which is designed to be the rollers that roll the metal and yes I know it’s from Carpenter and this is from crucible but I could also state CPM REX121. This is a knife grade semi stainless steel and for all intensive purposes has very similar elemental make up as some other PM steels. I’m going to try and get some if I can find it as it has been rolled in flat and bar stock. How ever working with this demanding metal is going to be gruelling (if I can source some) also I don’t think this is boring stuff and I find it intriguing that a steel very similar to ZDP-189 but with more elements such as carbon & chromium and molybdenum could be boring. This metal has a lot of potential in the right hands.

Stuman wrote: ↑

Sat Jun 16, 2018 10:20 am

Deadboxhero wrote: ↑

Fri Jun 15, 2018 3:55 pm

The have it available for powder form

Used in Cladding to low alloy steel "Cru-Clad"
Mpl-1 on the outside to prevent wear with a core steel of a more ductile substrate, low alloy, non knife grade, industrial steel.
Boring non knife stuff

They also mentioned difficulty making Mpl-1 into bar stock. Which is understandable if they have problems with rolling s110v, I'd imagine the problems are magnified with this grade.

http://www.nsm-ny.com/index.cfm?fuseact ... page_id=32

I’m pritty sure they could roll it into bar stock relatively easy. After all they done this with Maxamet which is designed to be the rollers that roll the metal and yes I know it’s from Carpenter and this is from crucible but I could also state CPM REX121. This is a knife grade semi stainless steel and for all intensive purposes has very similar elemental make up as some other PM steels. I’m going to try and get some if I can find it as it has been rolled in flat and bar stock. How ever working with this demanding metal is going to be gruelling (if I can source some)

guywithopinion wrote: ↑

Sun Jun 17, 2018 6:51 am

Taking the low end of each %, that is only 58.9% iron! Just thought that was interesting.

Stuman wrote: ↑

Sun Jun 17, 2018 1:58 pm

It’s very similar to ZDP-189

guywithopinion wrote: ↑

Sun Jun 17, 2018 5:56 pm

Stuman wrote: ↑

Sun Jun 17, 2018 1:58 pm

It’s very similar to ZDP-189

That's actually what seemed interesting too. Based on the numbers you gave, ZDP-189 is still almost 75% iron. And people talk about how ZDP isn't technically a steel. That thing is close to iron not even being the main ingredient!

sal wrote: ↑

Mon Jun 18, 2018 8:02 am

Getting a sample is sometimes difficult if there is no inventory. We'll inquire.

sal

Stuman wrote: ↑

Mon Jun 18, 2018 7:59 am

guywithopinion wrote: ↑

Sun Jun 17, 2018 5:56 pm

Stuman wrote: ↑

Sun Jun 17, 2018 1:58 pm

It’s very similar to ZDP-189

That's actually what seemed interesting too. Based on the numbers you gave, ZDP-189 is still almost 75% iron. And people talk about how ZDP isn't technically a steel. That thing is close to iron not even being the main ingredient!

Yeah it’s something that requires investigation but I have very limited tools and equipment not like Spyderco who will have a huge myriad of testing equipment. I do have a Rockwell C scale machine and knife making equipment but nothing like what Spyderco could test this steel with. There are a few steels I want to get around to making and testing with different heat treats and this one just went past those and made it top of my list. I’d love it if Spyderco actually done some testing on this steel because from what I can see it has the potential to be a fantastic knife steel.