@Larrin: Sandvik 7C27Mo2

[Doc Dan]

I wonder about this steel. I had never heard of it and then read mention of it in an article about something else. I understood it is used in electric razors, or something. What are its characteristics? Would it make a good knife steel? Why haven't we seen it?

[JD Spydo]

Well Larrin thank you so much for mentioning one of the Sandvik blade steels. Over the years I've owned two knives that I was told had Sandvik steel blades and I liked them both. The Sandvik company may not be as celebrated as Crucible or Carpenter but I still think they make a great product overall.

I'm not familiar with any of their newer products but they convinced me that the Swedish people make some really good, high quality blade steel material. Sandvik through the years have also made other high quality tools and supplies as well. I've never heard anything bad about that company.

[cali]

It is more or less 420HC.

[Larrin]

Yes it’s a variant of 420 with a Mo addition.

[JD Spydo]

It is more or less 420HC.

That's interesting because I have a couple of BUCK knives that have that 420HC steel. And it's not bad at all. Not as good as some of the steels made by Crubible, Carpenter and Bohler Uddeholm>> but it's certainly a lot better than most blades you can buy at big discount stores.

Again I've been impressed with anything made by Sandvik. They are a good company with a good reputation.

[Doc Dan]

Thanks Larrin! I've never heard of this steel. I had no idea Sandvik made such a thing. I wonder what the Mo does in the mix?

[Stuart Ackerman]

Molybdenum, like chromium, has an effect on the corrosion resistance of steel. Molybdenum can also increase the hardenability, toughness, and tensile strength of steel. It increases the hardenability by lowering the required quench rate during the heat treating process to make a strong and hard steel. Molybdenum can also reduce the risk of pitting in steel as it improves resistance to chloride induced corrosion.

[Larrin]

Molybdenum, like chromium, has an effect on the corrosion resistance of steel. Molybdenum can also increase the hardenability, toughness, and tensile strength of steel. It increases the hardenability by lowering the required quench rate during the heat treating process to make a strong and hard steel. Molybdenum can also reduce the risk of pitting in steel as it improves resistance to chloride induced corrosion.

Yes

[sal]

Crucible said that they added Moly to 154CM to reduce high temperature creep which they were experiencing in their fins on their jet engines. That was before Boeing they went to Titan fins.

We're planning on testing and using Sandvik's 19C.

sal

[Deadboxhero]

Crucible said that they added Moly to 154CM to reduce high temperature creep which they were experiencing in their fins on their jet engines. That was before Boeing they went to Titan fins.

We're planning on testing and using Sandvik's 19C.

sal

Well thats exciting, I've felt that 19C27 was a very underrated steel.

[Doc Dan]

Thanks, everyone. I learn something new, here, everyday.

[sal]

Crucible said that they added Moly to 154CM to reduce high temperature creep which they were experiencing in their fins on their jet engines. That was before Boeing they went to Titan fins.

We're planning on testing and using Sandvik's 19C.

sal

Well thats exciting, I've felt that 19C27 was a very underrated steel.

Hey Shawn, I', sure you will help us learn. Any thoughts on Rc?

Larrin,

Wouldn't mind having your input early on. They're rolling it for us. We have no experience with the alloy, so we'll take anything you can offer?

We'll like to get the best out of it that we can.....for all of you.

I guess you are now part of the R&D team for "Real World Testing". I'm sure Eric and Morton already have many testing processes through which we put our materials. As with all of our materials, especially blade steels, we hope this one flavor taste's good.

sal

[Deadboxhero]

Crucible said that they added Moly to 154CM to reduce high temperature creep which they were experiencing in their fins on their jet engines. That was before Boeing they went to Titan fins.

We're planning on testing and using Sandvik's 19C.

sal

Well thats exciting, I've felt that 19C27 was a very underrated steel.

Hey Shawn, I', sure you will help us learn. Any thoughts on Rc?

Larrin,

Wouldn't mind having your input early on. They're rolling it for us. We have no experience with the alloy, so we'll take anything you can offer?

We'll like to get the best out of it that we can.....for all of you.

I guess you are now part of the R&D team for "Real World Testing". I'm sure Eric and Morton already have many testing processes through which we put our materials. As with all of our materials, especially blade steels, we hope this one flavor taste's good.

sal

Sal, I think it would be most exciting if it was run +62rc for better resistance to deformation to highlight its qualities at the edge but only if low retained austenite can be achieved.

Perhaps we can get some material sent to Dr. Larrin for more testing data?

-Shawn

[lilshaver]

You gentlemen make me feel like a kid standing outside a candy factory looking through the front window watching the candy being made. Inquiring minds want to know so thanks for the information.

[Larrin]

Larrin,

Wouldn't mind having your input early on. They're rolling it for us. We have no experience with the alloy, so we'll take anything you can offer?

We'll like to get the best out of it that we can.....for all of you.

I guess you are now part of the R&D team for "Real World Testing". I'm sure Eric and Morton already have many testing processes through which we put our materials. As with all of our materials, especially blade steels, we hope this one flavor taste's good.

sal

Sure. I've done some heat treating experiments on 19C27 but my material is too thin for toughness and CATRA testing. I can help however you want.

[Notsurewhy]

I had never even heard of 19C27. According to what I just read in sandvik's site, 19C27 is very wear resistant but not entirely corrosion resistant. It also sacrifices some edge stability due to larger carbide size.

To my largely ignorant self, it sounds like it would keep a working edge for a good long time, but might not be the best for acute edge angles. I definitely will monitor to see what smarter folks say/find.

[sal]

Hi Larrin,

Any heat treat tricks or optimal RC would help.

I guess the reason we never received our samples was because all of their steel was rolled thin for kitchen cutlery, so they never had any thicker stuff to send me. We had a Zoom meeting with them (Europe, New York, Golden, Kauai). Lots of stuff was worked through. Now time will tell.

sal

[jwbnyc]

What does 19C27 steel bring to the table compared to VG-10?

[Doc Dan]

That is just what I was going to ask.

[sal]

I think that is the question we're all going to ask....and learn?

"Talkin' Story";

Many years ago, we were touring the very impressive Masahiro factory. I asked Koji, the President, why his Daido made proprietary MBS-26 was able to punch so high above it's weight? He said they followed the meticulous heat treating instruction provided by Daido. This included heat treating in lead pots, which I watched. The secret" knowledge of the blade industry never ceases to amaze me.

sal