Steel is the single biggest driver of what a katana costs and what it can do. Everything else — fittings, lacquer, wrap — is dressing on top of it. Here is what each grade actually means, without the marketing.
The one number that matters: carbon
Carbon steel grades in the 10xx family are named for their carbon content. 1045 is 0.45 % carbon, 1060 is 0.60 %, 1095 is 0.95 %.
More carbon means the steel can be hardened further, so it takes and holds a finer edge. It also means it is more brittle and rusts more eagerly. There is no grade that wins at everything, which is exactly why several are still in use.
1045 carbon steel
The entry point. It hardens only moderately, which makes it forgiving to work with and cheap to produce, and it is almost impossible to make it shatter.
What it is for: display pieces, wall mounts, cosplay, first swords. What it is not for: cutting practice. A 1045 blade will roll or dent its edge rather than hold it.
1060 carbon steel
The workhorse, and the grade most functional katanas use. 1060 sits in the sweet spot: hard enough to hold a working edge, tough enough to survive mistakes. It is forgiving of an imperfect cut, which matters more than most beginners expect — bad technique puts enormous lateral stress on a blade.
If you want one sword that displays well and can also cut tatami or water bottles occasionally, this is usually the right answer.
1095 carbon steel
High carbon, high hardness, and a noticeably keener edge that stays keen longer. The trade-offs are real: 1095 is less tolerant of a bad angle, and it will develop surface rust within days if you leave it unoiled in a humid room.
This is a grade for people who will maintain the blade. It rewards attention and punishes neglect.
T10 tool steel
T10 is a tungsten alloy tool steel with roughly 1 % carbon plus silicon. The silicon is the point: it improves wear resistance and, usefully, makes the steel less prone to the surface rust that plagues 1095.
T10 is also the grade of choice for clay tempering, because it produces a bright, clearly defined hamon. Most of our top-tier blades are T10, clay-tempered.
Folded / Damascus steel
Folded steel is not a grade — it is a process applied to one. The billet is folded and forge-welded on itself ten or more times, producing thousands of layers and a visible rippling grain.
Historically, folding existed to even out inconsistent bloom steel. With modern steel that is already uniform, folding is primarily aesthetic. It is genuinely beautiful and it signals hand work, but a folded 1060 blade is not automatically superior to a well-heat-treated monosteel 1095 one. Buy folded steel because you want the pattern, not because you have been told it is stronger.
Stainless steel
Worth addressing directly, because it comes up constantly. Stainless blades over roughly 30 cm have a reputation for brittleness at the length of a katana, and the traditional view in sword circles is that stainless belongs on decorative and display swords rather than cutters.
That does not make stainless useless. It is stable, it resists rust with almost no maintenance, and for a replica that will live on a wall it is a sensible, low-upkeep choice. Our movie sword replicas and Lord of the Rings swords are built this way on purpose: they are display pieces, and they will still look right in five years without an oiling routine.
Quick comparison
| Steel | Edge holding | Toughness | Rust risk | Best for |
| 1045 | Low | Very high | Moderate | Display, cosplay |
| 1060 | Good | High | Moderate | All-round, light cutting |
| 1095 | Very good | Moderate | High | Cutting, experienced owners |
| T10 | Excellent | Good | Lower than 1095 | Collectors, visible hamon |
| Folded | Depends on base steel | Depends on base steel | Moderate | Pattern and hand work |
| Stainless | Moderate | Low at katana length | Very low | Display replicas |
So which should you buy?
Be honest about what the sword is for. A blade that will hang on a wall has no reason to be 1095 — you are paying for performance you will never use and signing up for maintenance you will resent. A blade you intend to cut with has no business being 1045.
For most people buying their first real katana, 1060 is the correct answer. For a second sword, or a first one bought as a collector's piece, clay-tempered T10 is where the visible craftsmanship starts.
See the full range in Japanese swords, or read how a katana is forged to see where these steels fit in the process.