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I've seen this question and obviously carbon steel (not stainless) knives look quite bad without extra care (picture from the linked to question)

not neat at all

Now my question is - why face the trouble? Why would I prefer a carbon steel kitchen knife over a stainless steel one?

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up vote 11 down vote accepted

Carbon steel is more malleable and less brittle than stainless steel. This means that it is easier to hone on a knife steel, to maintain an extremely sharp edge.

Some folks feel that the benefit of that sharp edge–for example, in easily slicing tomatoes, and other very fast prep tasks–is worth the compromise of more persnickety maintenance.

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No!!!! Carbon steel is MORE brittle than stainless steel. Carbon steel is structurally harder than stainless, which typically results in better edge retention and hardness, but at the cost of brittleness (i.e. more prone to chipping). Contrary to popular belief, hardness is not always the most desirable quality when it comes to steel...optimal steel depends on what the knife is being used for and what kind of maintenance the user is willing to do on the knife. – tohster Dec 27 '15 at 6:53
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It's also a myth that hardness makes a difference with slicing tomatoes, cucumbers, etc. The "toothiness" of the edge grind, geometry of the edge bevel and blade, and stiction of the knife blade surface as it slices through the product make a far greater difference to the feel, precision and resistance felt slicing a tomato than the material of the blade. – tohster Dec 27 '15 at 6:56
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The exact carbon content and heat treatment will determine if the steel is brittle or soft. Stainless steel simply gives up a little of the overall "quality" of the steel to make itself stainless, carbon still will always be able to outperform it on any hardness measure, but will rust. – Jonathon Wisnoski Apr 4 at 19:13

Lots of opinins but not much metallurgical knowledge.....reminds me of hotroders thinking something is better if its made out of billet instead 6061 AL (same thing). Where's that crazy smilie?

Carbon steel is actually a misnomer, in many industries carbond steel is refered to a mild steel alloy that isn't stailness. What our knives are made of is a medium to high carbon tool steel with a enough carbon that it can be hardened (all steels have some carbon). Stick with asking for carbon steel at the kitchen store or they won't know what you're talkning about, but thats the truth of it

Hardening means heating it past the critical tempurature (roughly red hot) and quenching it (differently mediums for different alloys, ie water, oil, air). After hardening, the steel is 'tempered' which means its reheated to a much low temp to 'let down' the steel or make it less brittle. This also reduces hardness, so the maker wants to create the right balance - different tools get different tempers depending whats expected from them - ie an impact tool is tempered at a higher temp to let it down more so it doesn't shatter. Left dead hard after a quench, the blade would be too brittle - it could shatter if dropped sort of thing.

Incidentally, this is what the japanese laminated cutting tools are all about - leave the inner tool steek very hard and use soft outer ducticle steel to give it strength.

Carbon steel knives were not created for sushi. They predate any stainless knife which is essentially a perfermance compromise - not has hard a steel (which IS edge holding ability) but the don't rust.

Carbon steel can be made extremely hard. even slightly harder than HSS (high speed steel) whose advantage is hardness at heat (up to red hot). This is an important foot note as grinding does expose the steel to very high temps - not all over but where the steel molecule meets the abrasive. Temps are high enough to effect the temper. This is why HSS is preferable for say a drill bit or even a chisel so it can ground and why you have to carefull with carbone steel if you're grinding so you don't wreck the temper

Anyway, maybe more than you wanted to know, but thats facts around the differences.

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Carbon steel is, as you've mentioned, a lot harder to maintain than stainless steel. However, carbon steel is a harder metal than stainless steel, meaning that it will be less vulnerable to the physical stress of everyday use and will hold an edge longer than stainless steel. As such, carbon steel knives are generally regarded as better for heavy or extended use in busy kitchens, as the chefs won't have to stop and hone their blades quite as often throughout the day. Stainless steel knives, on the other hand, are much more resistant to staining and corrosion, but they are harder to sharpen and will require more frequent sharpening overall than carbon steel knives.

Each material has its pros and cons. In the end, you're really just trading one shortcoming for another—extra cleaning with carbon steel and extra sharpening with stainless steel—so the choice really just depends on what the knife will most often be used to do. If you frequently do a lot of hard chopping or slicing, investing in at least one quality carbon steel knife for heavy-duty applications may be a good idea. But if you're at home just cooking for your yourself or your family and will usually only need the knife for basic tasks and low-impact cuts, stainless steel will probably do just fine in most situations.

You can find more information on common knife materials in the following article:

http://www.jesrestaurantequipment.com/jesrestaurantequipmentblog/knife-guide-chefs-knives/

Hope that helps, and good luck with any future knife shopping!

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Carbon steel is much cheaper than stainless steel although that isn't the only reason.

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This is not correct. There is a great deal of price overlap between carbon and non-carbon steels, and high-end carbon steels can sell for 2x to 4x the price of stainless steels. For example, see alphaknifesupply.com/bladematerials.htm – tohster Dec 27 '15 at 6:45

I have a a few of each I don't k ow much about the science behind the making of them but personally I find I can get a super sharp edge on my carbon steel knives in no time at all which they hold well where as it takes me longer to get a no where near as sharp edge on my stainless steel knives and they don't hold it as long. This however could simply be my sharpening skills. Overall I find carbon much sharper and a lot nicer to use and I would always choose them over stainless but if I'm in a hurry I use a stainless. Personal preference I guess but I would recommend trying a carbon I got a small paring one to start and was so impressed I decided to splash not on a chefs knife.

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I have one of each - I do a lot of general prep work with my stainless but prefer the Carbon for dismembering cuts of meat. The sharper blade tends to cut through ligament and tendon easier.

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The high carbon steel knifes are self sharpening as much as they are rust prone. You may have to sharpen it under heavy use but on gentle use on veggies you'll eventually get an edge that will last a decade or more. As the edge wears sharp, will the sides. A thinner blade will result. My mother has been using these types of knifes for 80 years.

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Unless you're considering going into Sushi preparation where a razor sharp edge to your knife is required I'd stick to the easy to maintain stainless steel knives.

Carbon steel knives are primarily intended (but not exclusively) for sushi preparation. The Japanese are fanatical about sushi hence the whole carbon steel knife industry surrounding it.

No surprise that the majority of the best carbon steel knives originate from Japan.

Stick with stainless steel which is fine for all kitchen uses apart form sushi preparation.

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Not entirely accurate I'd say... I have a Chinese cleaver (such as the one in the picture in the original question) which is Carbon steel. I also can't think of very many cases where a sharp knife wouldn't be better. Though the maintenance is the biggest tradeoff – talon8 Jan 11 '13 at 18:47
    
@talon8 I said primarily intended (but not exclusively). Carbon steel knives and the associated hassle of looking after them is not required by your average home cook, unless you're doing sushi. I stand by what I've stated. – spiceyokooko Jan 11 '13 at 21:18
    
I was disagreeing with your statement about them being "primarily intended for" sushi. – talon8 Jan 12 '13 at 4:44

My three carbon steel knives are used constantly in my not-fancy home kitchen. Cut, rinse or quickly wash and drain cutting edge down.....very simple to maintain. I would use no other! The one SS knife I use is a small, serrated paring knife. It does the job pretty well. Part of the secret...maybe a lot of it, is the serration. In the case of carbon steel they are tiny...and effective. I should add I am one of those cooks who cannot cook W/o cleaning as she goes. It makes me crazy to have pots and pans strewn all over the kitchen. And most would be on the floor as country space is limited. So maybe that is why I do not mind the trade off of cleaning the knife. Happy cooking, whatever your comfort zone is. Linda

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Are you saying you are using serrated carbon steel knives? – talon8 Nov 26 '15 at 15:43
    
Hello Linda, it is unclear what your answer is. Your answer just states:"I like them and they do the job pretty well." Other knives do their job pretty well, too and need less maintaining. – Lars Friedrich Nov 26 '15 at 20:52

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