Japan's Two Premium Stainless Workhorses
VG-10 and AUS-10 are both respected Japanese stainless steels used in mid-to-premium kitchen knives and EDC folders. While they share similar composition ranges, their grain structure and carbide formation differ enough to affect sharpening experience and edge quality.
Composition Overview
| Element | VG-10 | AUS-10 |
|---|---|---|
| Carbon | 0.95-1.05% | 0.95-1.10% |
| Chromium | 14.5-15.5% | 13-14.5% |
| Cobalt | 1.3-1.5% | — |
| Vanadium | 0.1-0.3% | 0.15-0.35% |
| Molybdenum | 0.9-1.2% | 0.4-0.8% |
The key difference: VG-10 adds cobalt, which strengthens the steel matrix at high hardness without forming carbides. This provides slightly better edge retention and a finer grain without significantly increasing carbide volume. AUS-10, without cobalt, relies more on carbon and vanadium carbides for wear resistance.
Sharpening Test Results
Using identical sharpening protocols (1000/6000 Naniwa Super Stones), both knives were sharpened from a moderately dull state:
- VG-10 (60 HRC): Reached hair-shaving sharpness in ~12 minutes; responded well to both light and moderate pressure; burr formation was consistent and easy to detect.
- AUS-10 (60 HRC): Reached equivalent sharpness in ~14 minutes; slightly more stubborn burr required more alternating passes; final edge quality was comparable.
The practical difference is small. VG-10 sharpens marginally faster and more predictably, but AUS-10 is perfectly manageable with quality stones.
Edge Quality at Different Grits
At 1000 grit, both produce excellent working edges. At 6000+ grit, VG-10 takes a slightly finer polish due to its cobalt-enhanced matrix, producing a marginally keener apex. This difference is noticeable in paper-slicing but negligible in practical kitchen use.
Real-World Maintenance
Both respond well to ceramic honing rods and stropping. Neither should be honed on traditional steel rods (risk of chipping). Both benefit from periodic stropping to extend edge life.
VG-10 is slightly easier to sharpen and takes a marginally finer edge, but AUS-10 is close behind. For most users, the difference is negligible. If you sharpen your own knives, either is a fine choice. The specific knife brand and heat treatment matter more than the naming of VG-10 vs AUS-10. Both are premium options that will reward good sharpening technique.