Merely a sales gimmick as the tool steels of old ( D-2, O-1) are truly surperb.
In my mind, the tool steels that have been around for quite awhile present plenty of knife for most users.
I offered knives 20 years ago in O-1 and D-2.
I sold around 150 knives and I have NEVER had a complaint !
D-2 is a SUPER knife steel, BUT once again, Heat Treating rules.
O-1 and D-2 have not been shown to be objectively superior to modern alloys such as S30V, S35VN, S90V, S110V, 20CP/204P/M390, XHP, or even the powder metallurgy versions of carbon tool steels such as CPM M4. Therefor, O-1 and D-2 cannot be objectively considered superb.Exotic steels ?
Merely a sales gimmick as the tool steels of old ( D-2, O-1) are truly surperb.
That's demonstrably false. D2's 12% chromium content does not meet the AISI minimum of 13% chromium content to be considered a stainless steel. The 440 series steels at 18% chromium content combined with lower carbon content which leaves more chromium free in the solution are much more corrosion resistant. D2's vanadium content does help it keep some chromium free in the solution by absorbing some of the carbon to form vanadium carbides rather than chromium carbides, but it's not enough to make up for the 440 series steels 50% greater chromium content.Sorry Pal,
D-2 ,because of it's high Cromium content is right up there with the 400 series stainless knife steels as far as corrosion resistance.
Sorry Pal,
D-2 ,because of it's high Cromium content is right up there with the 400 series stainless knife steels as far as corrosion resistance
Even milder stainless and carbon steel chips out on the edge. Even when cutting relatively soft materials. Even with a good heat treat. You just need a good enough microscope to see it.Nicks from normal use?
That spells bad heat treatment to me.
It's no gimmick. Carpenter's own description of CTS-XHP states: "Air hardening, high carbon, high chromium, corrosion resistant alloy which can be described as either a high hardness Type 440C stainless steel or a corrosion resistant D2 tool steel. Possesses corrosion resistance equivalent to Type 440C stainless but can attain a maximum hardness of 64 HRC, approaching that of D2 tool steel." - https://www.cartech.com/ssalloysprod.aspx?id=3710.I use my knives pretty frequently at work, and just within my experience, XHP has held up with much less attention than my older D2 knives. Maybe the gimmick's on me, but I'm happy with it.
True enough. That said, the miracle of alloying is that a smidge of this and a dash of that to an existing alloy can make a huge difference in the properties of the new alloy.IMHO, the " super " alloys are merely an addition of a smidge of this and a dash of that to an existing steel that's been around for awhile.
That's almost true in the case of CTS-XHP. Once has to pur in perspective a an increase from 12% chromium content to 16% in the alloy is a 33% increase.IMHO, the " super " alloys are merely an addition of a smidge of this and a dash of that to an existing steel that's been around for awhile.
We've discussed this here in other threads. In this thread the OP was addressing the difficulty some have with sharpening advanced modern steels. The steels used in most German kitchen knives are low carbon and easy to sharpen.The BIGGEST ploy is the " Secret German Steel" employed I guess, to make folks believe that they are getting a really super knife.
I agree! Metallurgy IS a constantly changing Science but do you have to have a constantly changing set of kitchen knives or drastically change your daily carry?True enough. That said, the miracle of alloying is that a smidge of this and a dash of that to an existing alloy can make a huge difference in the properties of the new alloy.
One classic example is the addition of a tiny bit scandium to aluminum alloy. Just 0.2% to 0.6% of scandium by weight (a smidge/dash by anyone's definition), DOUBLES the strength of the resulting alloy.
Admittedly that's not a steel alloy, but the general principle still applies. It's part of why metallurgy was often such a mystery in times past. Tiny "impurities" could result in one product being tremendously more sturdy than another apparently identical one.
The BIGGEST ploy is ...
My Kitchen knives are, for the most part, the Carbon steel Old Hickory stuff. If reasonably cared for, they last a lifetime. Not dishwasher safe because of the wooden grips but, made in U.S.A., reasonably priced and easy edge maintenance.My kitchen knives average about 50 bucks a piece. Why? Because I like nice knives and refuse to buy Chinese junk at Walmart. I guess I spend my money foolishly??
However, I just have a 3 knife set, plus a bread knife. I am no pro chef, I just need the basics. So I really dont't have a ton of money invested in them.
They are not made of some new fangled super steel. Pretty basic, but quality forged stuff, not flimsy stamped sheet metal.
I agree! Metallurgy IS a constantly changing Science but do you have to have a constantly changing set of kitchen knives or drastically change your daily carry?
Kitchen Knives are a favorite of mine and I hate to see folks spend BIG BUCKS ($ 300.00 plus on a set of knives when the average kitchen could get a lifetime functional set of knives at Walmart for right around $50.00!
My kitchen knives loosely fit this description. They aren't the super thin sheet metal knives with no weight to them. They are thick, heavy stainless steel, with integral solid steel bolster and came with a nice block. I maybe have paid closer to $100.00. But with my experience with this set, I'm going to add a caveat that along with the $50.00 set of knives, you may also need a $50.00 belt sander to shape the initial edge. It would have taken several hours to turn these into actual knives, using just stones, due to the high chromium content and initial profile.when IN FACT a $50.00 knife set from Walmart would fill the bill in most cases!