If you ask me, "what makes for a quality kitchen knife?" – ignoring the specific type – my thoughts often drift towards Damascus Steel blades.
These blades – through reputation and (well, sure) marketing – have a well-deserved reputation as durable, sharp, and attractive blades... and the all-stars in your kitchen.
Today, let's dive headfirst into Damascus steel. We'll discuss the origin of the allure, and some of the aspects that make these blades so desirable.
It only makes sense when something's after its place of origin, right?
Damascus steel has its roots firmly planted in Syria. "Damascus" is the capital city of Syria, renowned for its sword-making prowess.
Exactly how Damascus Steel was coined is lost to history. We don't know whether the name soldiers on today because swords were made in Damascus, or whether finished swords were merely sold there (or nearby). Syria imported "wootz steel" from India, and after that, the weapons industry took advantage of the high-quality materials to craft legendary blades with multiple layers of steel.
In modern times, Damascus Steel generally refers to the distinctive banding patterns which result from multiple forged layers of stainless steel. While we've lost the original methodology for forging these blades, modern processes produce a distinct (and unique) pattern, which is as beautiful and durable as the originals.
Not every attractive, patterned blade is a Damascus Steel blade.
Blades made from both crucible steel and the infamous wootz steel create the intricate and artsy blade styles you recognize in Damascus blades. Although they may look similar, the blade's origin and forging process might sway a bit from Damascus.
Let's talk a bit about Wootz steel and crucible steel in general.
Originating in South India, many literary texts address the history of the world-famous "Wootz Steel." The word "wootz" is probably a corruption of "ukku," which is the word for "steel" in several different languages in south India.
It wasn't until around the end of the 18th century that the word migrated to English and Europeans learned about the makings of the steel.
As of the publishing of this article, we don't have a record of when wootz steel came to be. We do have evidence that wootz steel was circulating around the 4th century BC during Alexander the Great's campaign. Still,
there is some anecdotal evidence that it was also relatively prominent in the 3rd century BC in ancient India.
The name "crucible steel" might throw you off as many can use it to describe specific blades. However, crucible steel generally refers to the process of creating a finished blade rather than an actual final product.
To create generic crucible steel, stock such as cast iron, wrought iron, or blister steel is smelted inside of a crucible, a metal or ceramic container. In ancient times this process was more necessary than in the present; in the past, it was impossible to melt those materials with the use of coal fires and charcoal.
Using the crucible steel process, the blades that resulted were both extremely tough and diverse in makeup. Edges consisted of layers of both high-carbon and low-carbon steel. In can be said the intricate pattern we associate with Damascus steel blades are created using the crucible steel process, whether or not the blades consist of "Wootz" steel inputs.
So, when you hear "Damascus Steel Blades," assume that the forging process matches crucible steel.
As stated previously, charcoal and coal fires aren't quite hot enough to produce the desired results from cast and wrought iron.
Crucible steel has a significant advantage: blades forged using this method have higher levels of carbon and can be produced (and reproduced) in a reliable manner. High-carbon steel is both durable and sharp – the blades produced in this manner are durable and have incredibly sharp edges.
However, if your process is not controlled, the resulting product may be one of two extremes:
If your process tends towards wrought iron, the edge is too soft. If it falls toward cast iron, the edge is too brittle. Balance is vital with your forging process – this is where the crucible steel process shines.
The diversity of pattern characterizes wootz steel; both look and color are different in each band of steel. However – and this is crucial – what we refer to as "wootz steel" is not the same as the wootz steel metallurgists in the 18th century recognized.
The original process included hammering out hot porous iron to release the slag. From there, forgers broke it apart and sealed it with wood chips until all the carbon was absorbed.
There's a uniform composition of steel produced by this process – carbon composition is relatively predictable from this process as the impurities are burnt away. From there, the steel can be fashioned into the likes of Damascus blades.
The ancient method of its creation was known to create blades that were tougher and sharper than others. Eventually, this technique steadily died out around the 1700s.
Although wootz blades have tell-tale patterns, not all of them have recognizable patterns. When there was a pattern, it probably differed because of the smith making the steel (and his training).
For instance, a smith creating wootz steel in India may not create blades with similar appearance to a smith making wootz in China.
Perhaps this type of steel gained its legendary status from the ancient techniques and material from which it stems. Without the crucible steel process or the "near east"'s production of wootz steel, Damascus steel never would have come to be.
Let's clear something else up before delving in: "Damascus steel" is another umbrella term referring to different things.
Today, you may see wootz Damascus and pattern-welded Damascus. Modern blades aren't equivalent to their ancestors – the original technique to make them is a lost art.
It's no matter. Even with the modern "Damascus" process, Damascus steel is still extremely well-regarded. It boils down to the same two reasons we've already named: knives forged using the Damascus process are durable and extremely attractive.
Let's step back from durability and sharpness for a second. One of the most popular discussions surrounding Damascus blades is how beautiful they are.
Undoubtedly, once the concept of Damascus steel made it to Europe, it gained popularity because swords and knives didn't look like anything else Europeans knew.
Known as "damask," the distinctive wavy pattern of Damascus blades can make any skeptic fall in love. Since the process is never perfectly replicable, every Damascus steel blade is truly unique – you have a unique pattern every time, and your knife is truly personalized.
The reliability of Damascus blades boils down to the number of layers of steel (each with slightly different characteristics). Since the process inherently leads to many layers, resulting blades are incredibly durable and well-hardened. The edge is stronger and more resistant to chipping than with other blades and processes.
As mentioned, Damascus is well known for its multiple – visible – layers. The additional layers don't only contribute to its toughness, but also quite literally its appearance.
With both the ancient and modern Damascus process, you have to go through the process several different times. With most Damascus steel blades in existence, that's a minimum of roughly a dozen times but often more – up to tens or even hundreds of cycles.
Although the Damascus steel of today is not precisely like the steel of ancient times, we're pretty sure the modern processes retain most of the advantages of the original. (Perhaps unlike the infamous Roman concrete). Some characteristics seem to have managed to survive all of the technique changes.
Since the original process of creating Damascus blades is lost, surviving blades do have slightly different characteristics than modern blades. That's because even though the layering process is similar, it's not quite the same.
From what we can tell, the ancient system concentrated on battle readiness – not your ability to prepare a mean meal. Most of the Damascus Blades we know of are swords and other fighting knives for combat purposes.
As such, surviving swords were expected to have a certain amount of strength and reliability to them. Sharpness especially was vital to handle the impact expected of these blades – make sure you factor in the nature of the surviving blades when you compare swords to your kitchen knives.
One of the critical strengths of Damascus steel, ironically, comes through its impurities. And what's the big deal is about impurities in durable steel like Damascus? It starts with the root.
As you've seen, Damascus comes from an input of raw wootz steel. As far as steel goes, wootz is impure. From these impurities, Damascus finds its strength and long-lasting durability.
Impurities in the form of other elements and compounds – prominently through carbon – spread through the various layers during the Damascus creation process. The side effect of the carbon's introduction with the other enhancing impurities leads to the extreme edge and durability.
Touching on it once again, the blades you see labeled as Damascus now are not exactly like the blades found in ancient Syria. That doesn't mean they aren't worth something, of course, it just means that they're different.
Around the mid-1700s – just as the technique for forging wootz saw a decline – the creation of patterned blades also lost its use and popularity. There are numerous compelling explanations for this loss.
Some people blame the loss on changing trade routes. To me, this is a plausible reason: the trade routes were so vast in the first place that any interruption could cause the technique to fall out of style.
Other folks blame a loss of the process. It's possible that further refinement of the steel forging process meant we dropped methods that introduced these desirable impurities. Impurities, in this case, which made the blades so strong and worthwhile.
Most likely, though, there could be a combination of different causes. Through one or all of the above, we might have lost an imperfect process that somehow produced such superior blades.
Previously, we talked a bit about the differences found in crucible and wootz steel. There are even more differences when you discuss pattern-welded Damascus.
Cast Damascus is also known just as wootz. As we've talked about, in ancient times, it was a popular method used in the East optimized for weapon creation.
In terms of Damascus, it also refers to the process of melding iron and steel with charcoal. Casting Damascus was done in an atmosphere that had little or no oxygen. Carbon was absorbed from the charcoal, and the resulting slow cooling process produced the crystalline material.
When it comes to fabricated Damascus, this is pattern-welded or modern Damascus steel. The most significant difference with cast Damascus is pattern-welded Damascus nowadays often has surface treatments that lend similarity of appearance to ancient Damascus without necessarily giving other advantages.
Just because the Damascus steel forging treatment was lost centuries ago, that isn't going to stop anyone from trying to replicate Damascus steel.
When modern blacksmiths set out to crack the code, they seemed to first focus on recreating the chemical composition. This generation could never seem to grasp precisely what the ancient Syrians did. However, the first generation of blacksmiths studying Damascus steel did make some essential breakthroughs in the process.
Back in the 1980s, a report out of Stanford spoke about how two metallurgists accidentally came across a modern method. They produced something akin to Damascus steel while trying to make a "superplastic" metal.
What makes this incident stand out is the steel was kept at high temperatures for just a few hours. While it cooled, they shaped and then reheated the steel to a moderate temperature to shape further. With this method, the metallurgists created small beneficial impurities – nothing like the original Damascus process, mind you, but impurities which made the resulting blade more durable and sharp than with other methods.
Modern techniques borrow heavily from those Stanford experiments, with several enhancements that get the resulting blades closer to the original's properties. With these modern methods, today's Damascus blades have a more pronounced watery pattern in a vacuum than the ancient blades.
Even with the compromises, various aesthetic patterns are possible. This is because the multiple metals are still hammered together at high temperatures. Forge welding – regardless of particular inputs – always gives off that pattern variation, so every vintage of Damascus steel stands out amongst other blades.
Today's Damascus steel blades may not be exactly the same, but they still have legendary, unique patterns with sharp edges and a reliable overall build. It's no wonder you find so many Chef's knives, santokus, and other kitchen knives using the modern process.
They'll look good in your kitchen, and you probably don't have to worry about replacing them anytime soon. Just watch your fingers – they'll let you know how sharp they are.