Steel matchup
MagnaCut and VG-10, compared on the five things that decide a blade: toughness, edge retention, corrosion, heat treat and how each one grinds.
A powder-metallurgy stainless steel balancing high toughness, strong edge retention, and excellent corrosion resistance, widely regarded as one of the most well-rounded modern knife steels.
A Japanese stainless steel famous for high-end kitchen cutlery, using a cobalt addition to reach high hardness and a fine, precise edge without giving up too much toughness.
Dimension by dimension
Each steel's own note, its score out of five, and what separates the two in that one column. The higher score in a row is marked in purple.
| Dimension | MagnaCut | VG-10 | What separates them |
|---|---|---|---|
| Toughness | In Charpy impact testing at 62.5 HRC, MagnaCut delivers roughly 38 ft-lbs of toughness, about 40% tougher than S35VN at similar hardness, and roughly double the toughness of M390. It performs on par with tough non-stainless steels like CPM 4V and Vanadis 4 Extra. | Adequate for kitchen and EDC use; the cobalt addition helps it hold toughness at a higher hardness than its composition alone would suggest, though it is not built for hard-use abuse. | MagnaCut wins clearly. It was engineered specifically to resist chipping better than older high-chromium stainless steels, and VG-10, while solid, is a generation behind in this respect. |
| Edge retention | CATRA edge-retention testing places MagnaCut between S35VN and S45VN, very good, though not at the extreme end occupied by steels like S90V or M390. | Very good edge retention with a fine, precise bite, which is exactly why it became the standard steel for premium Japanese kitchen knives. | Close, with a slight edge to MagnaCut. Both hold a working edge well for stainless steels, but MagnaCut's more modern carbide structure gives it a small, real advantage in extended cutting tasks. |
| Corrosion resistance | MagnaCut keeps its full 10.7% chromium in solid solution, giving it corrosion resistance that exceeds S35VN, S45VN, M390, and 20CV, among the best of any high-performance knife steel, approaching though not quite reaching saltwater-grade steels like Vanax or LC200N. | 15% chromium gives it excellent stainless performance, well suited to kitchen use where the blade is washed constantly. | MagnaCut pulls ahead here too, its alloy design pushes it into top-tier stainless corrosion resistance, while VG-10 is very good but not quite in the same class. |
| Heat treat | Recommended heat treatment from Crucible: austenitize at 2050 degrees F (1121 C) for approximately 25 minutes, then plate or oil quench, followed by tempering 2x2 hours at 350 degrees F (176 C). This typically yields 61-62.5 HRC. An optional cryogenic treatment (dry ice or liquid nitrogen) immediately after quenching can push hardness to 63-65+ HRC. Because MagnaCut is a stainless PM steel, it should be heat treated in a foil-wrapped or controlled-atmosphere environment to prevent scale and decarburization, and requires an oven capable of holding precise soak temperatures. A dedicated quench plate system makes it much easier to control warping during the plate quench step. For the general principles behind every stage of this process, see our Complete Guide to Heat Treating Knife Steel. | Austenitize at 1920-1960 F (1050-1070 C) to fully dissolve the carbides into the matrix. Quench in oil or air for rapid cooling to form martensite. Temper at 300-390 F (150-200 C) to relieve internal stress and balance hardness against toughness. Properly heat treated, VG-10 typically lands at 60-62 Rc. | VG-10 has a long-established heat-treat process that's widely documented and forgiving in its own right. MagnaCut was specifically designed for heat-treat forgiveness across a wide range of parameters, giving it a slight edge for hobbyist makers without precision equipment. |
| Grinding | Like other vanadium-rich powder-metallurgy steels, MagnaCut is moderately demanding to grind because of hard vanadium and niobium carbides. Expect belt wear similar to or slightly higher than S35VN; ceramic or high-quality zirconia belts are recommended for stock removal. | Reasonably easy to grind and finish for a vanadium-bearing stainless steel, which has helped it stay popular in high-volume Japanese cutlery production. | Comparable, both are moderately demanding stainless steels to grind and sharpen, with neither presenting a dramatically harder challenge than the other. |
Best use
MagnaCut
MagnaCut is the stronger all-around choice for EDC, hunting, and outdoor knives where toughness and corrosion resistance both matter.
Open the MagnaCut referenceVG-10
VG-10 remains an excellent, well-proven choice for kitchen knives, where its established track record and widespread availability in Japanese-style blade stock make it a natural fit.
Open the VG-10 reference
The long answer
VG-10 has decades of proven use behind it, especially in kitchen cutlery, while MagnaCut is a much newer steel designed to outperform older stainless steels across the board. Here’s how that theory holds up in practice.
Keep comparing
Keep reading
MagnaCut is one of the more demanding steels to grind on a 2×72 platform. Its heavy carbide load, the same chemistry that gives it excellent toughness and…
VG-10 grinds in the moderate, well-established range for premium stainless steels, easier than high-carbide CPM steels like CPM 20CV or S30V, but slightly…
Every knife steel is iron plus a specific recipe of other elements, and each of those elements pulls the steel’s behavior in a particular direction…
Same bench
Whichever steel wins, the grind is only as flat as the platen behind it. I machine the parts, hand-assemble, track and test Torus grinders in Sterling, Illinois.
Current dual-axis platform with a fiber-laser-cut 6061 chassis and single-knob tracking.
Current dual-axis platform with a steel chassis, more mass and less vibration.
Prior-design aluminum chassis, 90-degree tilt and 1.5-inch tooling arms.
One-man shop
Tell me what the blade is for and how you heat treat, and I will tell you which of these I would put on the bench — including when the answer is neither.
